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Optical conductivity of the half-filled Hubbard chain
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UNSPECIFIED (2000) Optical conductivity of the half-filled Hubbard chain. PHYSICAL REVIEW LETTERS, 85 (18). pp. 3910-3913. ISSN 0031-9007.
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Abstract
We combine well-controlled analytical and numerical methods to determine the optical conductivity of the one-dimensional Mott-Hubbard insulator at zero temperature. A dynamical density-matrix renormalization group method provides the entire absorption spectrum for all but very small coupling strengths. In this limit we calculate the conductivity analytically using exact field-theoretical methods. Above the Lieb-Wu gap the conductivity exhibits a characteristic square-root increase. For small to moderate interactions, a sharp maximum occurs just above the gap. For larger interactions, another weak feature becomes visible around the middle of the absorption band.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Journal or Publication Title: | PHYSICAL REVIEW LETTERS | ||||
| Publisher: | AMERICAN PHYSICAL SOC | ||||
| ISSN: | 0031-9007 | ||||
| Official Date: | 30 October 2000 | ||||
| Dates: |
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| Volume: | 85 | ||||
| Number: | 18 | ||||
| Number of Pages: | 4 | ||||
| Page Range: | pp. 3910-3913 | ||||
| Publication Status: | Published |
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