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Thermoelectric power of MgB2-xBex

Title
Thermoelectric power of MgB2-xBex
Authors
Ahn J. S.Choi E. S.Kang W.Singh D. J.Han M.Choi E. J.
Ewha Authors
강원
SCOPUS Author ID
강원scopus
Issue Date
2002
Journal Title
Physical Review B - Condensed Matter and Materials Physics
ISSN
0163-1829JCR Link
Citation
vol. 65, no. 21, pp. 2145341 - 2145345
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We investigated thermoelectric power S(T) of MgB2-xBex (x=0, 0.2, 0.3, 0.4, and 0.6) S(T) decreases systematically with x, suggesting that the hole density increases. Our band calculation shows that the increase occurs in the σ band. With the hole doping, Tc decreases. Implication of this phenomenon is discussed within the BCS framework. While the Mott formula explains only the linear part of S(T) at low temperature, incorporation of electron-phonon interaction enables us to explain S(T) over wide temperature range including the anomalous behavior at high temperature.
DOI
10.1103/PhysRevB.65.214534
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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