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UID:DSC-22433
DTSTART;TZID=Europe/Berlin:20251111T110000
SEQUENCE:1762843172
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20251111T120000
URL:https://www.dresden-science-calendar.de/calendar/de/detail/22433
LOCATION:IFW\, Helmholtzstraße 2001069 Dresden
SUMMARY:Chen: Generalized Peierls substitution for Wannier Obstructions: re
 sponse to disorder and interaction
CLASS:PUBLIC
DESCRIPTION:Speaker: Dr. Shuai Chen\nInstitute of Speaker: Max Planck Insti
 tute for the Physics of Complex Systems      (MPI PKS) Dresden\nTopics:\n\
 n Location:\n  Name: IFW (D2E.27\, IFW Dresden)\n  Street: Helmholtzstraß
 e 20\n  City: 01069 Dresden\n  Phone: \n  Fax: \nDescription: I will explo
 re the interplay between quantum geometry\, interactions\, and external fi
 elds in complex band systems. When Wannier obstructions prevent a descript
 ion based solely on atomic-like orbitals\, it complicates the prediction o
 f electromagnetic responses\, particularly in the presence of disorder and
  interactions. To address this\, we introduce a generalized Peierls substi
 tution framework that incorporates Lagrange multipliers to enforce the con
 straints of Wannier obstruction in the band of interest. This framework en
 ables us to derive effective descriptions of interactions and disorder\, a
 ccounting for the non-trivial quantum geometry of the band. We apply this 
 approach to various examples\, including the diamagnetic response in flat-
 band superconductors and interaction-induced delocalization effects in fla
 t-band metals. .
DTSTAMP:20260710T174811Z
CREATED:20251030T063832Z
LAST-MODIFIED:20251111T063932Z
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