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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-4284
DTSTART:20170127T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T043201Z
LAST-MODIFIED:20170120T164216Z
LOCATION:2241 Chamberlin hall
SUMMARY:A New Spin on Superconductivity\, Physics Department Colloquiu
 m\, Amir Yacoby\, Harvard University
DESCRIPTION:Nearly a hundred years after its discovery\, superconducti
 vity remains one of the most intriguing phases of matter. In 1957 Bard
 een\, Cooper and Schrieffer (BCS) presented their theory of supercondu
 ctivity describing this state in terms of pairs of electrons arranged 
 in a spatially isotropic wave function with no net momentum and a spin
  singlet configuration. Immediately thereafter\, a search began to fin
 d materials with unconventional superconductivity where pairing deviat
 es from conventional BCS theory.<br>
\n<br>
\nOne particular class of 
 unconventional superconductors involves pairs arranged in triplet rath
 er than singlet configurations. Such superconductors may enable dissip
 ationless transport of spin and may also give rise to elementary excit
 ations that do not obey the conventional Fermi or Bose statistics but 
 rather have non-Abelian statistics where the exchange of two particles
  transforms the state of the system into a new quantum mechanical stat
 e.<br>
\n<br>
\nIn this talk I will describe some of our recent experi
 ments that explore the proximity effect between a conventional superco
 nductor and a semiconductor with strong spin-orbit interaction. Using 
 supercurrent interference\, we show that we can tune the induced super
 conductivity continuously from conventional to unconventional that is 
 from singlet to triplet. Our results open up new possibilities for exp
 loring unconventional superconductivity as well as new ways for detect
 ing unconventional pairing in known materials.
URL:https://www.physics.wisc.edu/events/?id=4284
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