期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 470, 期 4, 页码 304-308出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physc.2010.01.043
关键词
Iron-based superconductors; Normal state properties; Phenomenological model; BaFe2As2; Co-doping
资金
- Division of Materials Sciences and Engineering, Office of Basic Energy Sciences
A simple two-band 3D model of a semimetal is constructed to determine which normal state features of the Ba(Fe1-xCox)(2)As-2 superconductors can be qualitatively understood within this framework The model is able to account in a semiquantitative fashion for the measured magnetic susceptibility, Hall, and See-beck data, and the low temperature Sommerfeld coefficient for 0 < x < 0 3 with only three parameters for all x. The purpose of the model is not to fit the data but to provide a simple starting point for thinking about the physics of these interesting materials Although many of the static magnetic properties, such as the increase of the magnetic susceptibility with temperature, are reproduced by the model, none of the spin-fluctuation dynamics are addressed A general conclusion from the model is that the magnetic susceptibility of most semimetals should increase with temperatures (C) 2010 Elsevier B.V. All rights reserved
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