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Fractional Chern insulators in bands with zero Berry curvature

Abstract:

Even if a noninteracting system has zero Berry curvature everywhere in the Brillouin zone, it is possible to introduce interactions that stabilize a fractional Chern insulator. These interactions necessarily break time-reversal symmetry (either spontaneously or explicitly) and have the effect of altering the underlying band structure. We outline a number of ways in which this may be achieved and show how similar interactions may also be used to create a (time-reversal-symmetric) fractional to...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted manuscript

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Publisher copy:
10.1103/PhysRevB.92.195104

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Theoretical Physics
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Theoretical Physics
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review B Journal website
Volume:
92
Issue:
19
Publication date:
2015-11-03
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
URN:
uuid:bba1a667-d4e5-4236-9fce-df5749d70bef
Source identifiers:
579444
Local pid:
pubs:579444

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