BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2664
DTSTART:20120607T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T041055Z
LAST-MODIFIED:20120601T190009Z
LOCATION:5310 Chamberlin
SUMMARY:Chiral Fermi liquids\, R. G. Herb Condensed Matter Seminar\, D
 mitrii Maslov\, University of Florida
DESCRIPTION:Chirality ("handedness") of electron spins is a hallmark o
 f many systems of current interest\, including two-dimensional electro
 n gases (2DEG) in semiconductor heterostructures\, surface (edge) stat
 es of topological insulators\, and graphene (in the last example\, it 
 is a pseudo- rather than real spin which is chiral). While by now we k
 now a lot about single-particle properties of these systems\, their ma
 ny-body properties are just starting to be explored. In this talk\, I 
 will discuss a general phenomenology of non-SU(2) invariant Fermi liqu
 ids. The main prediction of the phenomenological approach--complemente
 d by a microscopic calculation--is the existence of a new type of coll
 ective modes: "chiral spin waves"\, which we propose to observe experi
 mentally in a semiconductor hetetorostructure with an in-plane modulat
 ion of the spin-orbit interaction. I will also discuss how spin-orbit 
 interaction affects the non-analytic corrections to the Fermi-liquid b
 ehavior. In particular\, a non-analytic dependence of the spin suscept
 ibility on the momentum is shown to result in a new type of long-range
  RKKY interaction between localized moments embedded into a 2DEG\, wit
 h a period given by the spin relaxation length rather the Fermi wavele
 ngth. 
URL:https://www.physics.wisc.edu/events/?id=2664
END:VEVENT
END:VCALENDAR