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Condensed Matter Seminars

ics Condensed Matter
Wednesday, April 26, 2017
5:00 PM
Physics Building, Room 313
Note special date.
Note special time.
Alexander Sirota [Host: Jeffrey Teo]
UVA-Department of Physics
"Surfaces and Slabs of Fractional Topological Insulators"

Fractional topological insulators (FTI) are electronic topological phases in (3 + 1) dimensions enriched by time reversal (TR) and charge U(1) conservation symmetries. We focus on the simplest series of fermionic FTI, whose bulk quasiparticles consist of decon ned partons that  carry fractional electric charges in integral units of e = e=(2n + 1) and couple to a discrete Z2n+1 gauge theory. We propose massive  symmetry preserving or breaking FTI surface states. Combining the long-ranged entangled bulk with these topological surface states, we  deduce the novel topological order of quasi-(2 + 1) dimensional FTI slabs as well as their corresponding edge conformal eld theories. We will also describe some past work on coupled wire constructions of Weyl/Dirac semimetals, and some new work about mechanical topology and conformal field theory.

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