BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:3
UID:UW-Physics-Event-8574
DTSTART:20240222T160000Z
DTEND:20240223T050000Z
DTSTAMP:20260413T223355Z
LAST-MODIFIED:20240415T211054Z
LOCATION:5310 Chamberlin
SUMMARY:Superconductor — Insulator Transition and Coulomb drag in no
 n-Fermi-Liquid modelled by an array of SYK grains\, R. G. Herb Condens
 ed Matter Seminar\,  Alexander Chudnovskiy\, Hamburg
DESCRIPTION:We present a model of a strongly correlated system with a 
 non-Fermi liquid high temperature phase. Its ground state undergoes an
  insulator to superconductor quantum phase transition  (QPT) as a func
 tion of a pairing interaction strength. Both the insulator and the sup
 erconductor are originating from the same interaction mechanism. The r
 esistivity in the insulating phase exhibits the activation behavior wi
 th the activation energy\, which goes to zero at the  QPT. This leads 
 to a wide quantum critical regime with an algebraic temperature depend
 ence of the resistivity.  Upon raising the temperature in the supercon
 ducting phase\, the model exhibits a finite temperature phase transiti
 on to a Bose metal phase\, which separates the superconductor from the
  non-Fermi liquid metal. 
\n
\nFurthermore\, in the high-temperature n
 on-Fermi-liquid phase\, we analyse Coulomb drag and near-field heat tr
 ansfer in a double-layer system of incoherent metals. The absence of q
 uasiparticles in the strange metal leads to temperature-independent dr
 ag resistivity\, which is in strong contrast with the quadratic temper
 ature dependence in the Fermi liquid regime. We show that all paramete
 rs of the theoretical model can be independently measured in near-fiel
 d heat transfer experiments\, performed in Fermi liquid and strange me
 tal regimes. 
URL:https://www.physics.wisc.edu/events/?id=8574
END:VEVENT
END:VCALENDAR