John Bardeen
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{{Infobox_Scientist
| name = John Bardeen
| image = John Bardeen.jpg
|imagesize = 110px
|caption = John Bardeen
| birth_date = {{birth date|1908|5|23|df=y}}
| birth_place = [[Madison, Wisconsin]], [[United States|USA]]
| death_date = {{death date and age|1991|1|30|1908|5|23}}
| death_place = [[Boston, Massachusetts|Boston]], [[Massachusetts]]
| nationality = [[United States]]
| field = [[Physics]]
| alma_mater = [[University of Wisconsin-Madison]]</br> [[Princeton University]]</br>
| work_institutions = [[Bell Labs]]</br> [[University of Minnesota]]</br> [[University of Illinois at Urbana-Champaign]]
| doctoral_advisor = [[Eugene Wigner]]
| doctoral_students = [[John Schrieffer]]
| known_for = [[Transistor]]</br> [[BCS theory]]
| prizes = [[Nobel Prize in Physics]] (1956) </br> [[Nobel Prize in Physics]] (1972) </br>[[IEEE Medal of Honor]] (1971)
}}
'''John Bardeen''' ([[May 23]] [[1908]] – [[January 30]] [[1991]]) was an [[United States|American]] [[physicist]] and [[electrical engineer]], who won the [[Nobel Prize in Physics]] twice: first in 1956 with [[William Shockley]] and [[Walter Brattain]] for the invention of the [[transistor]]; and again in 1972 with [[Leon Neil Cooper]] and [[John Robert Schrieffer]] for a fundamental theory of conventional [[superconductivity]] known as the [[BCS theory]].
The transistor revolutionized the electronics industry, allowing the [[Information Age]] to occur, and made possible the development of almost every modern electronical device, from [[telephones]] to [[computer]]s to [[missile]]s. His developments in superconductivity, which won him his second Nobel, are used in medical advances such as [[Computed tomography|CAT scans]] and [[MRI]].
In 1990, Bardeen appeared on ''[[Life (magazine)|LIFE Magazine]]'' 's list of "100 Most Influential Americans of the Century."<ref name="washpost">{{cite news |title= John Bardeen, Nobelist, Inventor of Transistor, Dies |url= http://www.highbeam.com/doc/1P2-1047095.html|publisher=''Washington Post''|date=1991-01-31 |accessdate=2007-08-03 }}</ref>
== Early life ==
John Bardeen was born in [[Madison, Wisconsin|Madison]], [[Wisconsin]] on [[May 23]], [[1908]].<ref name="Biography of John Bardeen">{{cite web |url=http://nobelprize.org/nobel_prizes/physics/laureates/1956/bardeen-bio.html |title=Biography of John Bardeen |accessdate=2007-11-01 |publisher=The Nobel Foundation }}</ref> He was the second son of Dr. [[Charles R. Bardeen]] and Althea Harmer Bardeen. He was one of five children. His father, [[Charles Bardeen]], was Professor of Anatomy and the first Dean of the Medical School of the [[University of Wisconsin-Madison]]. Althea Bardeen, before marrying, had taught at the Dewey Laboratory School and run an interior decorating business; after marriage she was an active figure in the art world.
Bardeen's talent for [[mathematics]] was recognized early. His seventh grade mathematics teacher encouraged Bardeen in pursuing advanced work, and years later, Bardeen credited him for "first exciting [his] interest in mathematics."
Althea Bardeen became seriously ill with cancer when John was 12 years old. Charles Bardeen downplayed the seriousness of her illness so that it won't affect his children. John was stunned when his mother died. Charles Bardeen married Ruth Hames, who was his secretary, to give his children the family he thought they needed. However, this didn't helped young John and he barely passed French that year.<ref name="John Bardeen 1">{{cite web |url=http://www.pbs.org/transistor/album1/bardeen/index.html |title=Biography of John Bardeen 1 |accessdate=2007-12-24 |publisher=PBS}}</ref>
Bardeen attended the University High School at Madison for several years, but graduated from Madison Central High School in 1923.<ref name="Biography of John Bardeen"/> He graduated from high school at age fifteen, even though he could have graduated several years earlier. His graduation was postponed due to taking additional courses at another high school and also partly because of his mother's death. He entered the [[University of Wisconsin-Madison]] in 1923. While in college he joined the [[Zeta Psi]] fraternity. He raised the needed membership fees partly by playing [[billiards]]. He was initiated as a member of [[Tau Beta Pi]] engineering honor society. He chose engineering because he didn't want to be an academic like his father and also because it had lots of maths. He also felt that engineering had good job prospects.<ref name="John Bardeen 1"/>
Bardeen received his [[Bachelor of Science|B.S.]] in [[electrical engineering]] in 1928 from the [[University of Wisconsin-Madison]].<ref name="CV of Bardeen">{{cite web |url=http://nobelprize.org/nobel_prizes/physics/laureates/1972/bardeen-cv.html |title=Curriculum Vitae of John Bardeen| accessdate=2007-11-01 |publisher = The Nobel Foundation }}</ref> He graduated in 1928 despite also having taken a year off during his degree to work in [[Chicago]].<ref name="genius in action">{{cite web |url=http://physicsworld.com/cws/article/print/17406 |title=John Bardeen: genius in action |accessdate=2008-01-07 |author=David Pines |date=2003-05-01 |publisher=physicsworld.com}}</ref> He had taken all the graduate courses in physics and mathematics that had interested him, and, in fact, graduated in five years, one more than usual; this allowed him time to also complete a Master's thesis, supervised by Leo J. Peters. He received his [[Master of Science|M.S.]] in electrical engineering in 1929 from Wisconsin.<ref name="CV of Bardeen"/> His mentors in mathematics were [[Warren Weaver]] and [[Edward Van Vleck]]. His primary physics mentor was [[John Hasbrouck van Vleck]], but he was also much influenced by visiting scholars such as [[Paul Dirac]], [[Werner Heisenberg]], and [[Arnold Sommerfeld]].
Bardeen was unsuccessful in his 1929 application to [[Trinity College, Cambridge]], for one of their coveted fellowships.<ref name="genius in action"/>
Bardeen stayed on for some time at Wisconsin furthering his studies, but he eventually went to work for Gulf Research Laboratories, the research arm of the [[Gulf Oil]] Company, based in [[Pittsburgh]].<ref name="washpost"/> From 1930 to 1933, Bardeen worked there on the development of methods for the interpretation of magnetic and gravitational surveys.<ref name="Biography of John Bardeen"/> He worked as a geophysicist. After the work failed to keep his interest, he applied and was accepted to the graduate program in mathematics at [[Princeton University]].<ref name="John Bardeen 1"/>
Bardeen studied both mathematics and physics as a graduate student, ending up writing his [[thesis]] on a problem in [[solid-state physics]], under [[Nobel laureate]] physicist [[Eugene Wigner]]. Before completing his thesis, he was offered a position as Junior Fellow of the Society of Fellows at [[Harvard University]] in 1935. He spent there the next three years, from 1935 to 1938, working with Nobel laureate physicist [[John Hasbrouck van Vleck]] and Bridgman on problems in cohesion and electrical conduction in metals, and also did some work on level density of nuclei. He received his [[Doctor of Philosophy|Ph.D.]] in [[mathematical physics]] from [[Princeton University]] in 1936.<ref name="Biography of John Bardeen"/>
== Academic career ==
In the fall of 1938, Bardeen started in his new role as assistant professor at the [[University of Minnesota]].
In 1941, the world was embroiled in war, and Bardeen was convinced by his colleagues to take a leave of absence and work for the [[Naval Ordnance Laboratory]]. He would stay there for four years. In 1943 he was invited to join the [[Manhattan Project]], but he refused, since he did not want to uproot his family. He received the Meritorious Civilian Service Award for his service at the NOL.
After the end of [[World War II]], Bardeen started seeking a return to academia, but the University of Minnesota did not realize the importance of the young field of [[solid-state physics]]. They offered him only a small raise. Bardeen's expertise in solid-state physics made him invaluable to [[Bell Labs]], which was just starting a solid-state division. Remembering the lack of support he had received previously from the university to pursue his research, he decided to take a lucrative offer from Bell Labs in 1945.
=== Bell Labs ===
In October 1945, John Bardeen began work at [[Bell Labs]]. Bardeen was a member of a Solid State Physics Group, led by [[William Shockley]] and chemist Stanley Morgan. Other personnel working in the group were [[Walter Brattain]], physicist Gerald Pearson, chemist Robert Gibney, electronics expert Hilbert Moore and several technicians. He moved his family to [[Summit, New Jersey]]. John Bardeen had met William Shockley when they were both in school in Massachusetts. He rekindled his friendship with Walter Brattain. Bardeen knew Walter Brattain from his graduate school days at Princeton. He had previously met Brattain through Brattain's brother, Bob Brattain. Bob Brattain was also a Princeton graduate student. Over the years the friendship of Bardeen and Brattain grew, both in the lab, where Brattain put together the experiments and Bardeen wove theories to explain the results and also on the golf course where they spent time on the weekends.
The assignment of the group was to seek a solid-state alternative to fragile glass [[vacuum tube]] amplifiers. Their first attempts were based on Shockley's ideas about using an external electrical field on a semiconductor to affect its conductivity. These experiments mysteriously failed every time in all sorts of configurations and materials. The group was at a standstill until Bardeen suggested a theory that invoked surface states that prevented the field from penetrating the semiconductor. The group changed its focus to study these surface states, and they met almost daily to discuss the work. The rapport of the group was excellent, and ideas were freely exchanged.<ref>Brattain quoted in ''Crystal Fire'' p. 127 </ref> By the winter of 1946 they had enough results that Bardeen submitted a paper on the surface states to ''[[Physical Review]]''. Brattain started experiments to study the surface states through observations made while shining a bright light on the semiconductor's surface. This led to several more papers (one of them co-authored with Shockley), which estimated the density of the surface states to be more than enough to account for their failed experiments. The pace of the work picked up significantly when they started to surround point contacts between the semiconductor and the conducting wires with [[electrolyte]]s. Moore built a circuit that allowed them to vary the frequency of the input signal easily and suggested that they use glycol borate (gu), a viscous chemical that didn't evaporate. Finally they began to get some evidence of power amplification when Pearson, acting on a suggestion by Shockley,<ref>''Crystal Fire'' p. 132</ref> put a voltage on a droplet of gu placed across a [[P-N junction]].
=== The invention of the transistor ===
[[Image:Replica-of-first-transistor.jpg|thumb|340px|A stylized replica of the first transistor invented at Bells Labs on [[December 23]], [[1947]].]]
{{main|Transistor|History of transistor}}
In the spring of 1947, [[William Shockley]] set Brattain and Bardeen to a task to explain why an amplifier he had devised didn't work. At the heart of the amplifier was a crystal of [[silicon]]. They would switch to [[germanium]] after some months. To figure out what was going on, Bardeen had to remember some of the quantum mechanics research that he had done on semiconductors while he was completing his Ph.D. at Princeton University. Bardeen had also come up with some new theories himself. By observing Brattain's experiments, Bardeen realized that everyone had been falsly assuming electrical current traveled through all parts of the germanium in a similar way. The electrons behaved differently at the surface of the metal. If they could control what was happening at the surface, the amplifier should work.
On [[December 23]], [[1947]], Bardeen and Brattain—working without Shockley—succeeded in creating a [[point-contact transistor]] that achieved amplification. By the next month, [[Bell Lab]]'s patent attorneys started to work on the patent applications.<ref name="John Bardeen 2">{{cite web |url=http://www.pbs.org/transistor/album1/bardeen/bardeen2.html |title=Biography of John Bardeen 2 |accessdate=2007-12-24 |publisher=PBS }}</ref>
Bell Labs attorneys soon discovered that Shockley's field effect principle had been anticipated and patented in 1930 by [[Julius Lilienfeld]], who filed his [[MESFET]]-like patent in Canada already on [[October 22]], [[1925]].<ref>{{patent|US|1745175|"Method and apparatus for controlling electric current" first filing in Canada on 22.10.1925}}</ref> Although the patent appeared "breakable" (it could not work) the patent attorneys based one of its four patent applications only on the Bardeen-Brattain point contact design. Three others submitted at the same time covered the electrolyte-based transistors with Bardeen, Gibney and Brattain as the inventors. Shockley's name was not on any of these patent applications. This angered Shockley, who thought his name should also be on the patents because the work was based on his field effect idea. He even made efforts to have the patent written only in his name, and told Bardeen and Brattain of his intentions.
At the same time Shockley secretly continued his own work to build a different sort of transistor based on junctions instead of point contacts; he expected this kind of design would be more likely to be viable commercially. Shockley worked furiously on his magnum opus, ''Electrons and Holes in Semiconductors'' which was finally published as a 558 page treatise in 1950. In it, Shockley worked out the critical ideas of drift and diffusion and the differential equations that govern the flow of electrons in solid state crystals. [[Diode#Shockley diode equation|Shockley's diode equation]] is also described. This seminal work became the "bible" for an entire generation of scientists working to develop and improve new variants of the transistor and other devices based on semiconductors.
Shockley was dissatisfied with certain parts of the explanation for how the point contact transistor worked and conceived of the possibility of minority carrier injection. This led Shockley to ideas for what he called a "sandwich transistor." This resulted in the [[Bipolar junction transistor|junction transistor]], which was announced at a press conference on [[July 4]], [[1951]]. Shockley obtained a patent for this invention on [[September 25]], [[1951]]. Different fabrication methods for this device were developed but the "diffused-base" method became the method of choice for many applications. It soon eclipsed the point contact transistor, and it and its offspring became overwhelmingly dominant in the marketplace for many years. Shockley continued as a group head to lead much of the effort at Bell Labs to improve it and its fabrication for two more years.
Shockley took the lion's share of the credit in public for the invention of transistor, which led to a deterioration of Bardeen's relationship with Shockley.<ref>Diane Kormos Buchwald. ''American Scientist'' 91.2 (Mar.-Apr. 2003): 185-86.</ref> Bell Labs management, however, consistently presented all three inventors as a team. Shockley eventually infuriated and alienated Bardeen and Brattain, and he essentially blocked the two from working on the junction transistor. Bardeen began pursuing a theory for superconductivity and left Bell Labs in 1951. Brattain refused to work with Shockley further and was assigned to another group. Neither Bardeen nor Brattain had much to do with the development of the transistor beyond the first year after its invention.<ref>''Crystal Fire'' p. 278</ref>
The "transistor" (a combination of "transfer" and "resistor") was 50 times smaller than the [[vacuum tube]]s it replaced in [[television]]s and [[radio]]s and allowed electrical devices to become more compact.<ref name="washpost"/>
=== University of Illinois at Urbana-Champaign ===
[[Image:Bardeen plaque uiuc.jpg|thumb|right|350px|A commemorative plaque remembering John Bardeen and the theory of superconductivity, at the [[University of Illinois at Urbana-Champaign]].]]
By 1951, Bardeen was looking for a new job. Fred Seitz, a friend of Bardeen, convinced the [[University of Illinois at Urbana-Champaign]] to make Bardeen an offer of $10,000 a year. Bardeen accepted the offer and left Bell Labs.<ref name="John Bardeen 2"/> He joined the engineering faculty and the physics faculty at the University of Illinois at Urbana-Champaign in 1951. He was Professor of Electrical Engineering and of Physics at Illinois. His first [[Doctor of Philosophy|Ph.D.]] student was [[Nick Holonyak]] (1954), the inventor of the first [[light-emitting diode|LED]] in 1962.<ref name="knightridder">{{cite news |title= Nice Guys Can Finish As Geniuses at University of Illinois in Urbana-Champaign. |url= http://www.highbeam.com/doc/1G1-96919218.html|work=Knight Ridder News Service |publisher=Chicago Tribune |date=2003-01-25 |accessdate=2007-08-03}}</ref>
At Illinois, he established two major research programs, one in the Electrical Engineering Department and one in the Physics Department. The research program in the Electrical Engineering Department dealt with both experimental and theoretical aspects of semiconductors, and the research program in the Physics Department dealt with theoretical aspects of macroscopic quantum systems, particularly superconductivity and quantum liquids.<ref>{{cite web |url=http://www.physics.uiuc.edu/history/bardeen.htm |title=Biography at the University of Illinois at Urbana-Champaign |accessdate=2007-11-06 |publisher=The University of Illinois at Urbana-Champaign }}</ref>
He was an active professor at Illinois from 1951 to 1975 and then became Professor Emeritus.<ref name="washpost"/>
=== The Nobel Prize in Physics in 1956 ===
In 1956, John Bardeen shared the [[Nobel Prize in Physics]] with [[William Shockley]] of Semiconductor Laboratory of Beckman Instruments and [[Walter Brattain]] of Bell Telephone Laboratories "''for their researches on semiconductors and their discovery of the transistor effect''".<ref>{{cite web |url=http://nobelprize.org/nobel_prizes/physics/laureates/1956/index.html |title=The Nobel Prize in Physics in 1956 |accessdate=2007-11-06 |publisher=The Nobel Foundation }}</ref>
Bardeen first heard the news that the [[Nobel Prize in Physics]] had been awarded to him, Brattain, and Shockley when he was making breakfast and listening to the radio on the morning of Thursday, [[November 1]], [[1956]].<ref name="John Bardeen 3">{{cite web |url=http://www.pbs.org/transistor/album1/bardeen/bardeen3.html |title=Biography of John Bardeen 3 |accessdate=2007-12-24 |publisher=PBS}}</ref>
The Nobel Prize ceremony took place in [[Stockholm]], [[Sweden]] on the evening of Monday, [[December 10]]. Bardeen, Brattain, and Shockley received their awards that night from [[King of Sweden|King]] [[Gustav VI Adolf of Sweden|Gustav VI]] and then adjourned for a great banquet in their honor. On that night the three men were together, and they remembered the days when they had been friends and a great research team.<ref name="John Bardeen 3"/>
Bardeen brought only one of his three children to the Nobel Prize ceremony. His two sons were studying at Harvard University, and Bardeen didn't wanted to disrupt their studies. King Gustav scolded Bardeen because of this, and Bardeen assured the King that the next time he would bring all his children to the ceremony.<ref name="John Bardeen 3"/>
=== BCS theory ===
{{main|BCS theory}}
In 1957, John Bardeen, in collaboration with [[Leon Cooper]] and his doctoral student [[John Robert Schrieffer]], proposed the standard theory of [[superconductivity]] known as the [[BCS theory]] (named for their initials).<ref name="washpost"/>
BCS theory explains [[conventional superconductor|conventional superconductivity]], the ability of certain [[metals]] at low [[temperatures]] to conduct [[electricity]] without [[electrical resistance]]. BCS theory views [[superconductivity]] as a macroscopic [[quantum mechanics|quantum mechanical]] effect. It proposes that [[electrons]] with opposite [[spin (physics)|spin]] can become paired, forming [[Cooper pair]]s. Independently and at the same time, superconductivity phenomenon was explained by [[Nikolay Bogoliubov]] by means of the so-called [[Bogoliubov transformation]]s.
In many superconductors, the attractive interaction between electrons (necessary for pairing) is brought about indirectly by the interaction between the electrons and the vibrating crystal lattice (the [[phonons]]). Roughly speaking the picture is the following:
An [[electron]] moving through a conductor will attract nearby positive charges in the lattice. This deformation of the lattice causes another electron, with opposite "spin", to move into the region of higher positive charge density. The two electrons are then held together with a certain binding energy. If this binding energy is higher than the energy provided by kicks from oscillating atoms in the conductor (which is true at low temperatures), then the electron pair will stick together and resist all kicks, thus not experiencing resistance.
=== The Nobel Prize in Physics in 1972 ===
In 1972, John Bardeen shared the [[Nobel Prize in Physics]] with [[Leon Neil Cooper]] of [[Brown University]] and [[John Robert Schrieffer]] of the [[University of Pennsylvania]] ''for their jointly developed theory of superconductivity, usually called the BCS-theory''.<ref>{{cite web |url=http://nobelprize.org/nobel_prizes/physics/laureates/1972/index.html |title=The Nobel Prize in Physics in 1972 |accessdate=2007-12-19 |publisher=The Nobel Foundation}}</ref>
Bardeen did bring all his children to the Nobel Prize ceremony in [[Stockholm]], [[Sweden]].<ref name="John Bardeen 3"/>
This was Bardeen's second Nobel Prize in Physics. He became the first person to win two Nobel Prizes in the same field.<ref name="chisuntimes2">{{cite news |title= Physicist John Bardeen, 82, transistor pioneer, Nobelist |url= http://www.highbeam.com/doc/1P2-4038249.html|publisher=''Chicago Sun-Times''|date=1991-01-31 |accessdate=2007-08-03}}</ref> He also became the third person out of only four to win two Nobel Prizes. The first two were [[Marie Curie]], who received the [[Nobel Prize in Physics]] in 1903 and [[Nobel Prize in Chemistry]] in 1911, and [[Linus Pauling]], who received the [[Nobel Prize in Chemistry]] in 1954 and [[Nobel Peace Prize]] in 1962. In 1980, [[Frederick Sanger]] won his second Nobel Prize in Chemistry and became the fourth person to win two Nobel Prizes.<ref>{{cite web |url=http://nobelprize.org/nobel_prizes/nobelprize_facts.html |title=Nobel Laureates Facts |accessdate=2007-12-19 |publisher=The Nobel Foundation}}</ref>
Bardeen gave much of his Nobel Prize money to fund the [[Fritz London]] Memorial Lectures at [[Duke University]].<ref>{{cite web |url=http://www.phy.duke.edu/~hm/flondonprizeawards.html |title=Fritz London Memorial Prize |accessdate=2007-12-24 |publisher=Duke University }}</ref>
=== Other awards ===
In 1971, Bardeen received the [[IEEE Medal of Honor]] for "his profound contributions to the understanding of the conductivity of solids, to the invention of the transistor, and to the microscopic theory of superconductivity."
Bardeen was one of 11 recipients given the Third Century Award from [[President of the United States|President]] [[George H.W. Bush]] in 1990 for "exceptional contributions to American society" and was granted a gold medal from the [[Soviet Union|Soviet]] Academy of Sciences in 1988.
=== Xerox ===
Bardeen was also an important advisor to [[Xerox|Xerox Corporation]]. Though quiet by nature, he took the uncharacteristic step of urging Xerox executives to keep their California research center, [[Xerox PARC]], afloat when the parent company was suspicious that its research center would amount to little.
== Death ==
Bardeen died of [[cardiac arrest]] at [[Brigham and Women's Hospital]] in [[Boston, Massachusetts]] on [[January 30]], [[1991]]. While he lived in [[Urbana, Illinois|Champaign-Urbana]], he was in Boston for medical consultation.<ref name="washpost"/>
Bardeen and his wife Jane had three children, James and William Bardeen and Elizabeth Greytak, and six grandchildren when he died.<ref name="washpost"/>
== Personal life ==
Bardeen married Jane Maxwell on [[July 18]], [[1938]]. While at Princeton, he met Jane during a visit to his old friends in [[Pittsburgh]].
Bardeen was a man with a very unassuming personality. While he served as a professor for almost 40 years at the University of Illinois, he was best remembered by neighbors for throwing cookouts where he would cook for his friends, many of whom were unaware of his accomplishments at the university. He enjoyed playing [[golf]] and going on [[picnic]]s with his family.<ref name="knightridder"/>
It has been said that Bardeen proves wrong the [[stereotype]] of the "crazy scientist."<ref name="knightridder"/> Lillian Hoddeson, a University of Illinois historian who wrote a book on Bardeen, said that because he "differed radically from the popular stereotype of [[genius]] and was uninterested in appearing other than ordinary, the public and the media often overlooked him."<ref name="knightridder"/>
==Legacy==
{{QuoteSidebar|40%|#eeffff|right|Quotation|Near the end of this decade, when they begin enumerating the names of the people who had the greatest impact on the 20th century, the name of John Bardeen, who died last week, has to be near, or perhaps even arguably at, the top of the list... Mr. Bardeen shared two Nobel Prizes and won numerous other honors. But what greater honor can there be when each of us can look all around us and everywhere see the reminders of a man whose genius has made our lives longer, healthier and better.| — "Chicago Tribune" Editorial, February 3, 1991}}
In honor of Professor Bardeen, the engineering [[Quadrangle (architecture)|quadrangle]] at the University of Illinois at Urbana-Champaign is named the Bardeen Quad.
Also in honor of Bardeen, [[Sony]] Corporation endowed a $53 million John Bardeen professorial chair at the University of Illinois at Urbana-Champaign, beginning in 1990. The current John Bardeen Professor is [[Nick Holonyak]], Bardeen's first doctoral student and protege.
At the time of Bardeen's death, then-University of Illinois chancellor Morton Weir said, "It is a rare person whose work changes the life of every American; John's did."<ref name="chisuntimes2"/>
Bardeen is honored on a 2008 United States [[Postage Stamp]] as part of the "American Scientists" series. The stamp was unveiled in a ceremony at the University of Illinois.<ref>{{cite web |url=http://www.engr.uiuc.edu/news/?xId=072808960714 |title=Bardeen Stamp Celebrated at Campus Ceremony |accessdate=2008-03-04 |publisher=University of Illinois }}</ref>
==References==
=== Cited references ===
{{reflist}}
=== General references ===
* Hoddeson, Lillian and Vicki Daitch. ''True Genius: the Life and Science of John Bardeen''. National Academy Press, 2002. ISBN 0-309-08408-3
==External links==
* [http://web.library.uiuc.edu/ahx/ead/ua/1110020/1110020f.html The Bardeen Archives] at the University of Illinois at Urbana-Champaign
* [http://nobelprize.org/physics/laureates/1972/bardeen-bio.html Biography from the Nobel Foundation]
* [http://www.nobel-winners.com/Physics/john_bardeen.html Biography from Nobel-Winners.com]
* [http://www.ieee.org/organizations/history_center/legacies/bardeen.html IEEE History Center biography]
* [http://www.iccc.univagora.ro IEEE 2nd Int. Conference on Computers, Communications and Control (ICCCC 2008), an event dedicated to the Centenary of John Bardeen (1908-1991)]
* [http://www.boston.com/globe/search/stories/nobel/1991/1991ae.html Associated Press Obituary of John Bardeen as printed in The Boston Globe]
* [http://www.aip.org/history/ohilist/4146_1.html Oral History interview transcript with John Bardeen 12 May 1977, American Institute of Physics, Niels Bohr Library and Archives]
* [http://www.aip.org/history/ohilist/25488.html Oral History interview transcript with John Bardeen 13 February 1980, American Institute of Physics, Niels Bohr Library and Archives]
{{Nobel Prize in Physics Laureates 1951-1975}}
{{IEEE Medal of Honor Laureates 1951-1975}}
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|DATE OF DEATH= {{death date|1991|1|30|mf=y}}
|PLACE OF DEATH= [[Boston, Massachusetts]]
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[[Category:Semiconductor physicists]]
[[Category:Superconductivity]]
[[Category:Scientists at Bell Labs]]
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[[Category:University of Illinois at Urbana-Champaign faculty]]
[[Category:University of Minnesota faculty]]
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