Giant Nernst effect in a Kondo lattice close to a quantum critical point

Details Giant Nernst effect in a Kondo lattice close to a quantum critical point Giant Nernst effect in a Kondo lattice close to a quantum critical point

2003-11-20

arxiv.org/abs/cond-mat/0311473v1

Phys. Rev. Lett. 92, 217002 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages including 3 figures

Scientific paper

10.1103/PhysRevLett.92.217002

We present a study of Nernst and Seebeck coefficients of the heavy-fermion superconductor CeCoIn$_{5}$. Below 18 K, concomitant with a field-dependent Seebeck coefficient, a large sub-linear Nernst signal emerges with a magnitude drastically exceeding what is expected for a multi-band Fermi-liquid metal. In the mixed state, in contrast with all other superconductors studied before, this signal overwhelms the one associated with the motion of superconducting vortices. The results point to a hitherto unknown source of transverse thermoelectricity in strongly interacting electrons.

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