Characterization of a topological Mott insulator in one dimension

Characterization of a topological Mott insulator in one dimension

We investigate properties of a topological Mott insulator in one dimension by examining the bulk topological invariant and the entanglement spectrum of a correlated electron model. We clarify how gapless edge states in a noninteracting topological band insulator evolve into spinon edge states in a t...

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Veröffentlicht in:Physical review letters 2014-05, Vol.112 (19), p.196404-196404, Article 196404
Hauptverfasser: Yoshida, Tsuneya, Peters, Robert, Fujimoto, Satoshi, Kawakami, Norio
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Sprache:eng
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Correlation
Evolution
Fermions
Insulators
Invariants
Phase transformations
Spin liquid
Topology
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container_title Physical review letters
container_volume 112
creator Yoshida, Tsuneya
Peters, Robert
Fujimoto, Satoshi
Kawakami, Norio
description We investigate properties of a topological Mott insulator in one dimension by examining the bulk topological invariant and the entanglement spectrum of a correlated electron model. We clarify how gapless edge states in a noninteracting topological band insulator evolve into spinon edge states in a topological Mott insulator. Furthermore, we propose a topological Mott transition, which is a new type of topological phase transition which has never been observed in free fermion systems. This unconventional transition occurs in spin liquid phases in the Mott insulator and is accompanied by zeros of the single-electron Green's function and a gap closing in the spin excitation spectrum.
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source American Physical Society Journals
subjects Correlation
Evolution
Fermions
Insulators
Invariants
Phase transformations
Spin liquid
Topology
title Characterization of a topological Mott insulator in one dimension
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