User: Guest  Login
Title:

Low-frequency conductivity in many-body localized systems

Document type:
Zeitschriftenaufsatz
Author(s):
Gopalakrishnan, Sarang; Müller, Markus; Khemani, Vedika; Knap, Michael; Demler, Eugene; Huse, David A.
Abstract:
We argue that the ac conductivity σ(ω) in the many-body localized phase is a power law of frequency ω at low frequency: specifically, σ(ω)∼ωα with the exponent α approaching 1 at the phase transition to the thermal phase, and asymptoting to 2 deep in the localized phase. We identify two separate mechanisms giving rise to this power law: deep in the localized phase, the conductivity is dominated by rare resonant pairs of configurations; close to the transition, the dominant contributions are rar...     »
Journal title:
Physical Review B 2015-09
Year:
2015
Journal volume:
92
Journal issue:
10
Fulltext / DOI:
doi:10.1103/physrevb.92.104202
Publisher:
American Physical Society (APS)
E-ISSN:
1098-01211550-235X
Date of publication:
11.09.2015
 BibTeX