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Unconventional density wave as possible explanation of the Nernst signal in CeCoIn 5
Author(s) -
Dóra Balázs,
Maki Kazumi,
Virosztek Attila,
Ványolos András
Publication year - 2005
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200460035
Subject(s) - nernst equation , nernst effect , condensed matter physics , quasiparticle , superconductivity , physics , seebeck coefficient , excited state , thermoelectric effect , magnetic field , chemistry , quantum mechanics , electrode
Abstract Recently large Nernst effect and Seebeck effect were observed above the superconducting transition temperature 2.3 K in a heavy fermion superconductor CeCoIn 5 . We interpret this large Nernst effect in terms of unconventional density wave (UDW), which appears around T = 18 K. In the presence of magnetic field, Landau levels are formed in UDW, and the transport is dominated by thermally excited quasiparticles across the levels. Our theory describes successfully the available experimental data, and the deduced fitting parameters are in accordance with what is expected in the vicinity of a quantum critical point. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)