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- Interacting topological insulators in three dimensions: classification and properties

A fundamental

open problem in condensed matter physics is how the dichotomy between conventional and topological band insulators is modified in the presence

of strong electron interactions. In this talk I describe recent work

showing that there are 6 new electronic topological insulators that have

no non-interacting counterpart. Combined with the previously known

band-insulators, these produce a total of 8 topologically distinct

phases. Two of the new topological insulators have a simple physical

description as Mott insulators in which the electron spins form spin

analogs of the familiar topological band-insulator. The remaining are

obtained as combinations of these two `topological paramagnets' and the

topological band insulator. These 8 phases form a complete list of all

possible interacting topological insulators, and are classified by a

$\mathbb{Z}_2^3$ group-structure. As a necessary part of the talk I will also review progress in the

theory of bosonic Symmetry Protected Topological phases in 3d.

Event Type:

Seminar

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Speaker(s):

Event Date:

Tuesday, August 20, 2013 - 15:30 to 17:00

Location:

Bob Room

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