Seebeck Coefficient of Kondo Insulators

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2002 English Publisher:Physical Society of JapanJournal:Journal of the Physical Society of Japan, volume 71, pages 288-290 (issn: 0031-9015, eissn: 1347-4073,

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Authors: Tetsuro Saso; Kentaro Urasaki;

doi: 10.1143/jpsjs.71s.288

Seebeck Coefficient of Kondo Insulators

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Abstract

Seebeck coefficient S of the Kondo insulators is investigated theoretically within the framework of the dynamical mean field theory. It is found that the temperature dependence changes from the ordinary behavior S ( T ) ∝ T -1 in semiconductors to approximately S ∝ T at low temperatures due to the finite imaginary part of the electron self-energy in the Kondo insulators with strong correlation. Realistic models for YbB 12 and FeSi based on the band calculations are also investigated.

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Saitama University
Japan

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