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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-9110
DTSTART:20250501T150000Z
DTEND:20250501T230000Z
DTSTAMP:20260413T135022Z
LAST-MODIFIED:20250414T204539Z
LOCATION:5310 Chamberlin
SUMMARY:Superconductivity with Anyons\, R. G. Herb Condensed Matter Se
 minar\,  Hart Goldman\, UMN
DESCRIPTION:I will discuss the phenomenology of superconductors hostin
 g both order parameter vortices and fractionally charged anyon excitat
 ions. I will demonstrate that in such systems superconductivity and to
 pological order are intertwined under applied magnetic fields\, leadin
 g to surprising observable consequences departing from traditional sup
 erconductivity from electronic pairing. In particular\,  I will show t
 hat vortices nucleated by perpendicular magnetic fields must trap anyo
 ns in their cores. However\, because only some vortices can trap an in
 teger number of anyons\, this places a constraint on the vortex phase 
 winding. In general\, rather than the expected hc/2e quantization of s
 uperconducting vortices\, we find instead the enhanced flux quantum of
  hc/e\, which I will argue should affect a wide range of observables. 
 I will further develop a general Landau-Ginzburg theory describing vor
 tex fluctuations and discuss the phase diagram as perpendicular magnet
 ic field is increased\, showing that condensation of the intertwined v
 ortices leads to exotic insulating phases hosting neutral anyons and a
  nonvanishing thermal Hall effect.
URL:https://www.physics.wisc.edu/events/?id=9110
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