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Institute for Condensed Matter Theory Seminar: Many-Body Electric Multipole Insulators

Event Type
Seminar/Symposium
Sponsor
The Institute for Condensed Matter Theory
Location
190 ESB
Speaker
Taylor Hughes, University Of Illinois Urbana Champaign
Views
60
Originating Calendar
Physics - The Anthony J Leggett Institute for Condensed Matter Theory Seminar

In this talk we discuss many-body electric multipole insulators with dipole conserving symmetries. We present rank-2 response theories for a 2D quadrupole insulator and a 3D chiral hinge insulator. We demonstrate how many-body operators for determining electric multipoles can be used to make a criterion for distinguishing multipole metals from multipole insulators in systems with conserved multipole moments. If time permits we will also show that some classes of non-interacting Weyl semi-metals can exhibit a rank-2 vector charge response theory.

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