Theory of Thermoelectric Power in High-Tc Superconductors

Details Theory of Thermoelectric Power in High-Tc Superconductors Theory of Thermoelectric Power in High-Tc Superconductors

2001-07-17

arxiv.org/abs/cond-mat/0107360v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 8 figures, to appear in J. Phys. Soc. Jpn. 70 (2001) No.10. Figure 2 has been revised

Scientific paper

10.1143/JPSJ.70.2840

We present a microscopic theory for the thermoelectric power (TEP) in high-Tc cuprates. Based on the general expression for the TEP, we perform the calculation of the TEP for a square lattice Hubbard model including all the vertex corrections necessary to satisfy the conservation laws. In the present study, characteristic anomalous temperature and doping dependences of the TEP in high-Tc cuprates, which have been a long-standing problem of high-Tc cuprates, are well reproduced for both hole- and electron-doped systems, except for the heavily under-doped case. According to the present analysis, the strong momentum and energy dependences of the self-energy due to the strong antiferromagnetic fluctuations play an essential role in reproducing experimental anomalies of the TEP.

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