title: Thermoelectric response near a quantum critical point: the case of CeCoIn5.
abstract: We present a study of thermoelectric coefficients in CeCoIn5 down to 0.1 K and up to 16 T in order to probe the thermoelectric signatures of quantum criticality. In the vicinity of the field-induced quantum critical point, the Nernst coefficient nu exhibits a dramatic enhancement without saturation down to the lowest measured temperature. The dimensionless ratio of the Seebeck coefficient to the electronic specific heat shows a minimum at a temperature close to threshold of the quasiparticle formation. Close to Tc(H), in the vortex-liquid state, the Nernst coefficient behaves anomalously in puzzling contrast with other superconductors and standard vortex dynamics.
authors.affiliation: Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Izawa
authors.forename: K
authors.initials: K
authors.lastname: Behnia
authors.forename: Y
authors.initials: Y
authors.lastname: Matsuda
authors.forename: H
authors.initials: H
authors.lastname: Shishido
authors.forename: R
authors.initials: R
authors.lastname: Settai
authors.forename: Y
authors.initials: Y
authors.lastname: Onuki
authors.forename: J
authors.initials: J
authors.lastname: Flouquet