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Non-Fermi glasses: Localized descendants of fractionalized metals

Abstract:
Non-Fermi liquids are metals that cannot be adiabatically deformed into free fermion states. We argue for the existence of "non-Fermi glasses" phases of interacting disordered fermions that are fully many-body localized (MBL), yet cannot be deformed into an Anderson insulator without an eigenstate phase transition. We explore the properties of such non-Fermi glasses, focusing on a specific solvable example. At high temperature, non-Fermi glasses have qualitatively similar spectral features to Anderson insulators. We identify a diagnostic, based on ratios of correlators, that sharply distinguishes between the two phases even at infinite temperature. Our results and diagnostic should generically apply to the high-temperature behavior of MBL descendants of fractionalized phases.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevLett.119.146601

Authors

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author

More from this funder
Funding agency for:
Parameswaran, S
Grant:
CA-15-327861
More from this funder
Funding agency for:
Parameswaran, S
Grant:
CA-15-327861
More from this funder
Funding agency for:
Gopalakrishnan, S

Publisher:
American Physical Society
Journal:
Physical Review Letters More from this journal
Volume:
119
Issue:
14
Pages:
1-5
Publication date:
2017-10-04
Acceptance date:
2017-09-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007

Keywords:
Pubs id:
pubs:726050
UUID:
uuid:aa47edbf-4f83-4f4a-94b0-deb70a334b02
Local pid:
pubs:726050
Source identifiers:
726050
Deposit date:
2017-09-08

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