Optical conductivity of the half-filled Hubbard chain
UNSPECIFIED. (2000) Optical conductivity of the half-filled Hubbard chain. PHYSICAL REVIEW LETTERS, 85 (18). pp. 3910-3913. ISSN 0031-9007Full text not available from this repository.
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|
|Official Date:||30 October 2000|
|Number of Pages:||4|
|Page Range:||pp. 3910-3913|
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