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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3199
DTSTART:20140127T223000Z
DURATION:PT1H0M0S
DTSTAMP:20260416T215137Z
LAST-MODIFIED:20140110T170121Z
LOCATION:Chamberlin 5310
SUMMARY:Topological insulators driven by an electron spin\, R. G. Herb
  Condensed Matter Seminar\, Maxim Dzero\, Kent State University
DESCRIPTION:The application of ideas developed in topology to the elec
 tronic band structure led to an intriguing discovery: materials can co
 nduct electricity at the surface while remaining insulating at the bul
 k. These materials\, called topological insulators\, will have transfo
 rmative impact on spintronics\, low-power transport\, and quantum comp
 uting. The search for a true topological insulator took years because 
 even best candidates exhibited significant bulk conductivity. Only rec
 ently\, literally in the past few months\, several experimental groups
  established that samarium hexaboride\, discovered in 1969 in Bell Lab
 s\, is a first topological insulator in its bulk form. In my talk\, I 
 review the theory which paved the way for this discovery. I will expla
 in how crystalline symmetry\, electron-electron interactions\, and orb
 ital degeneracy contribute to protecting the topological states in SmB
 6. In addition\, I will discuss the experimental signatures of metalli
 c surface states. Finally\, I formulate the theoretical principles for
  discovering new topological insulators with designable properties.
URL:https://www.physics.wisc.edu/events/?id=3199
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