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PRODID:UW-Madison-Physics-Events
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SEQUENCE:2
UID:UW-Physics-Event-6854
DTSTART:20220310T160000Z
DTEND:20220310T170000Z
DTSTAMP:20260414T113434Z
LAST-MODIFIED:20220202T172501Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Skyrmion pairing: a topological route to superconductivity\, R
 . G. Herb Condensed Matter Seminar\, Shubhayu Chatterjee\, University 
 of California Berkeley
DESCRIPTION:Atomically thin Van der Waals materials have emerged as a 
 highly versatile platform to advance our understanding of quantum matt
 er driven by strong electron correlations. Recent experimental breakth
 roughs in stabilizing few-layered graphene structures with a “magic�
 �� relative twist between layers has led to the discovery of a wide va
 riety of correlated states ranging from magnetism to superconductivity
 . Despite compelling experimental evidence for unconventional supercon
 ductivity\, the glue which binds electrons into Cooper pairs remains a
  mystery. In this talk I will propose a novel resolution: the Cooper p
 airs are composed of electrically charged topological spin textures ca
 lled “skyrmions\,” rather than electrons. First proposed by Tony S
 kyrme to model baryons in particle physics\, I will explain how their 
 topological properties can give rise to superconductivity in an electr
 onic model with purely repulsive interactions\, and without recourse t
 o phonons which are conventionally responsible for pairing. 
URL:https://www.physics.wisc.edu/events/?id=6854
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