Journal article
Mobile impurity approach to the optical conductivity in the Hubbard chain
- Abstract:
- We consider the optical conductivity in the one dimensional Hubbard model in the metallic phase close to half filling. In this regime most of the spectral weight is located at frequencies above an energy scale Eopt that tends towards the optical gap in the Mott insulating phase for vanishing doping. Using the Bethe Ansatz we relate Eopt to thresholds of particular kinds of excitations in the Hubbard model. We then employ a mobile impurity models to analyze the optical conductivity for frequencies slightly above these thresholds. This entails generalizing mobile impurity models to excited states that are not highest weight with regards to the SU(2) symmetries of the Hubbard chain, and that occur at a maximum of the impurity dispersion.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, pdf, 707.8KB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevB.93.205101
Authors
+ Engineering and Physical Sciences Research Council
More from this funder
- Grant:
- EP/I032487/1
- EP/J014885/1
- Publisher:
- American Physical Society
- Journal:
- Physical Review B More from this journal
- Volume:
- 93
- Issue:
- 20
- Article number:
- 205101
- Publication date:
- 2016-01-01
- Acceptance date:
- 2016-04-14
- DOI:
- EISSN:
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2469-9969
- ISSN:
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2469-9950
- Pubs id:
-
pubs:616923
- UUID:
-
uuid:82d6ba3d-2c23-4d9e-a3df-3bf53665d626
- Local pid:
-
pubs:616923
- Source identifiers:
-
616923
- Deposit date:
-
2016-04-21
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2016
- Notes:
- Copyright © 2016 American Physical Society. This is the accepted manuscript version of the article. The final version is available online from American Physical Society at: http://dx.doi.org/10.1103/PhysRevB.93.205101
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