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Transport of correlated electrons through disordered chains: A perspective on entanglement, conductance, and disorder averaging

Karlsson, Daniel LU and Verdozzi, Claudio LU (2014) In Physical Review B (Condensed Matter and Materials Physics) 90(20).
Abstract
We investigate electron transport in disordered Hubbard chains contacted to macroscopic leads, via the nonequilibrium Green's function technique. We observe a crossover of currents and conductances at finite bias which depends on the relative strength of disorder and interactions. We provide a proof that the coherent potential approximation, a widely used method for treating disorder averages, fulfills particle conservation at finite bias with or without electron correlations. Finally, our results hint that the observed trends in conductance due to interactions and disorder also appear as signatures in the single-site entanglement entropy.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
90
issue
20
publisher
American Physical Society
external identifiers
  • wos:000345247100001
  • scopus:84911374147
ISSN
1098-0121
DOI
10.1103/PhysRevB.90.201109
language
English
LU publication?
yes
id
0f565fca-ed58-48a3-ba47-7ada41dc865c (old id 4982978)
date added to LUP
2015-01-27 09:34:41
date last changed
2017-08-27 04:44:19
@article{0f565fca-ed58-48a3-ba47-7ada41dc865c,
  abstract     = {We investigate electron transport in disordered Hubbard chains contacted to macroscopic leads, via the nonequilibrium Green's function technique. We observe a crossover of currents and conductances at finite bias which depends on the relative strength of disorder and interactions. We provide a proof that the coherent potential approximation, a widely used method for treating disorder averages, fulfills particle conservation at finite bias with or without electron correlations. Finally, our results hint that the observed trends in conductance due to interactions and disorder also appear as signatures in the single-site entanglement entropy.},
  articleno    = {201109},
  author       = {Karlsson, Daniel and Verdozzi, Claudio},
  issn         = {1098-0121},
  language     = {eng},
  number       = {20},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Transport of correlated electrons through disordered chains: A perspective on entanglement, conductance, and disorder averaging},
  url          = {http://dx.doi.org/10.1103/PhysRevB.90.201109},
  volume       = {90},
  year         = {2014},
}