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Interaction-driven fractional quantum Hall state of hard-core bosons on kagome lattice at one-third filling.
- Source :
-
Physical Review B . Jul2016, Vol. 94 Issue 3, p1-1. 1p. - Publication Year :
- 2016
-
Abstract
- There has been a growing interest in realizing topologically nontrivial states of matter in band insulators, where a quantum Hall effect can appear as an intrinsic property of the band structure. While ongoing progress is under way with a number of directions, the possibility of realizing novel interaction-generated topological phases, without the requirement of a nontrivial invariant encoded in single-particle wave function or band structure, can significantly extend the class of topological materials and is thus of great importance. Here, we show an interaction-driven topological phase emerging in an extended Bose-Hubbard model on a kagome lattice, where the noninteracting band structure is topological trivial with zero Berry curvature in the Brillouin zone. By means of an unbiased state-of-the-art density-matrix renormalization group technique, we identify that the ground state in a broad parameter region is equivalent to a bosonic fractional quantum Hall Laughlin state, based on the characterization of universal properties including ground-state degeneracy, edge excitations, and anyonic quasiparticle statistics. Our work paves a way to finding an interaction-induced topological phase at the phase boundary of conventionally ordered solid phases. [ABSTRACT FROM AUTHOR]
- Subjects :
- *QUANTUM Hall effect
*BOSONS
*TOPOLOGICAL insulators
Subjects
Details
- Language :
- English
- ISSN :
- 24699950
- Volume :
- 94
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Physical Review B
- Publication Type :
- Academic Journal
- Accession number :
- 119473720
- Full Text :
- https://doi.org/10.1103/PhysRevB.94.035129