Bosonic Integer Quantum Hall Effect in an Interacting Lattice Model

Yin Chen He, Subhro Bhattacharjee, R. Moessner, Frank Pollmann

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

We study a bosonic model with correlated hopping on a honeycomb lattice, and show that its ground state is a bosonic integer quantum Hall (BIQH) phase, a prominent example of a symmetry-protected topological (SPT) phase. By using the infinite density matrix renormalization group method, we establish the existence of the BIQH phase by providing clear numerical evidence: (i) a quantized Hall conductance with |σxy|=2, (ii) two counterpropagating gapless edge modes. Our simple model is an example of a novel class of systems that can stabilize SPT phases protected by a continuous symmetry on lattices and opens up new possibilities for the experimental realization of these exotic phases.

Original languageEnglish
Article number116803
JournalPhysical Review Letters
Volume115
Issue number11
DOIs
StatePublished - 10 Sep 2015
Externally publishedYes

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