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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:
DateEvent
30 October 2000UNSPECIFIED
Volume: 85
Number: 18
Number of Pages: 4
Page Range: pp. 3910-3913
Publication Status: Published

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