Effects of Electronic Correlations on the Thermoelectric Power of the Cuprates

Дата и время публикации : 1997-05-05T13:18:05Z

Авторы публикации и институты :
G. Hildebrand
T. J. Hagenaars
W. Hanke
S. Grabowski
J. Schmalian

Ссылка на журнал-издание: PRB 56, R4317, 1997
Коментарии к cтатье: 4 pages, with eps figures
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el, cond-mat.supr-con

Краткий обзор статьи: We show that important anomalous features of the normal-state thermoelectric power S of high-Tc materials can be understood as being caused by doping dependent short-range antiferromagnetic correlations. The theory is based on the fluctuation-exchange approximation applied to Hubbard model in the framework of the Kubo formalism. Firstly, the characteristic maximum of S as function of temperature can be explained by the anomalous momentum dependence of the single-particle scattering rate. Secondly, we discuss the role of the actual Fermi surface shape for the occurrence of a sign change of S as a function of temperature and doping.

Category: Physics