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UID:DSC-21970
DTSTART;TZID=Europe/Berlin:20250512T100000
SEQUENCE:1747028367
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URL:https://dresden-science-calendar.de/calendar/de/detail/21970
LOCATION:IFW\, Helmholtzstraße 2001069 Dresden
SUMMARY:Ghosh: Quantum criticality in graphene – Twisted or not
CLASS:PUBLIC
DESCRIPTION:Speaker: Prof. Arindam Ghosh\nInstitute of Speaker: Indian Inst
 itute of Science\, Bangalore\nTopics:\n\n Location:\n  Name: IFW (A1E.10\,
  Hörsaal\, IFW Dresden)\n  Street: Helmholtzstraße 20\n  City: 01069 Dre
 sden\n  Phone: \n  Fax: \nDescription: The Dirac electrons in a clean laye
 r of graphene are expected to interact strongly with each other because th
 ey are three hundred times slower than photons in free space. The speed ca
 n be reduced even more in twisted bilayer graphene due to repulsion and fl
 attening of the low-energy electronic bands at specific angles\, or the ma
 gic angle. This led to many new quantum phases in twisted layers during re
 cent years. In this talk\, I shall give a few snapshots of our work in rea
 lizing and detecting emergent quantum many-body phases in graphene\, as a 
 result of strong Coulomb interaction between the electrons. I shall explai
 n our experimental approach in detecting such phases\, which combine multi
 ple experimental techniques\, and in particular\, augment standard electri
 cal transport with thermal and thermoelectric characterization. I shall sh
 ow how strong interaction leads to the breakdown of the semiclassical fram
 ework of thermoelectricity in twisted bilayers\, or that of the Widemann-F
 ranz law in very high-quality graphene where the electron-electron scatter
 ing becomes more frequent than the scattering of electrons by phonons or d
 isorder. We believe these experiments will lead to a new strategy to explo
 it high-quality graphene as a testing bed for some of the unifying concept
 s in physics.
DTSTAMP:20260711T050738Z
CREATED:20250508T053840Z
LAST-MODIFIED:20250512T053927Z
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