Journal article
Optical conductivity of the Hubbard chain away from half filling
- Abstract:
- We consider the optical conductivity σ1(ω) in the metallic phase of the one-dimensional Hubbard model. Our results focus on the vicinity of half filling and the frequency regime around the optical gap in the Mott insulating phase. By means of a density-matrix renormalization group implementation of the correction-vector approach, σ1(ω) is computed for a range of interaction strengths and dopings. We identify an energy scale Eopt above which the optical conductivity shows a rapid increase. We then use a mobile impurity model in combination with exact results to determine the behavior of σ1(ω) for frequencies just above Eopt which is in agreement with our numerical data. As a main result, we find that this onset behavior is not described by a power law.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, pdf, 422.7KB, Terms of use)
-
- Publisher copy:
- 10.1103/PhysRevB.93.125108
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review B More from this journal
- Volume:
- 93
- Issue:
- 12
- Publication date:
- 2016-03-03
- DOI:
- EISSN:
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1550-235X
- ISSN:
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2469-9950
- Keywords:
- Pubs id:
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pubs:612229
- UUID:
-
uuid:a2209cde-e409-4d55-a1ef-633c22143c81
- Local pid:
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pubs:612229
- Source identifiers:
-
612229
- Deposit date:
-
2016-04-21
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2016
- Notes:
-
This is an
Accepted Manuscript of a journal article published by the American Physical Society in Physical Review B on 2016-03-03, available online: https://doi.org/10.1103/PhysRevB.93.125108
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