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Thermoelectric power of La 2‐ x Sr x CuO 4 at high temperatures
Author(s) -
Kim J.S.,
Kim B.H.,
Kim D.C.,
Park Y.W.
Publication year - 2004
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.200310041
Subject(s) - nanowire , cathodoluminescence , materials science , exciton , epitaxy , atmospheric temperature range , single crystal , acceptor , phonon , photoluminescence , crystal (programming language) , optoelectronics , condensed matter physics , analytical chemistry (journal) , nanotechnology , crystallography , luminescence , chemistry , physics , meteorology , computer science , programming language , layer (electronics) , chromatography
Thermoelectric power (TEP) of high‐ T c superconductors has been investigated in a wide range of temperature ( T c < T < 700 K) for La 2‐ x Sr x CuO 4 . For wide doping level from underdoping to heavily overdoping, TEP follows the linear‐ T dependence above the broad peak temperature, T p . At high temperatures, however, TEP shows deviation from the linear‐ T dependence at a certain temperature T h , which is pronounced with doping up to x ∼ 0.2 and turns to be suppressed for further doping. The systematic change of the characteristic temperatures, T c , T p , and T h discussed in terms of the crossover behavior from a pseudogap state to strange metal in the underdoped regime and from strange metal to conventional metal in the overdoped regime.