Thermoelectric response near a quantum critical point: the case of CeCoIn5

Abstract

We present a study of thermoelectric coefficients in CeCoIn_5 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 lowest measured temperature. The dimensionless ratio of Seebeck coefficient to electronic specific heat shows a minimum at a temperature close to threshold of the quasiparticle formation. Close to T_c(H), in the vortex-liquid state, the Nernst coefficient behaves anomalously in puzzling contrast with other superconductors and standard vortex dynamics.

4 pages, 4 figures,final published version

References in corpus (5)

• Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
• On the thermoelectricity of correlated electrons in the zero-temperature limit
• Nernst effect in semi-metals: the meritorious heaviness of electrons
• Nonvanishing Energy Scales at the Quantum Critical Point of CeCoIn5
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Cited by in corpus (13)

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• Behavior of the Quantum Critical Point and the Fermi-liquid Domain in the Heavy Fermion Superconductor CeCoIn5 studied by resistivity
• Quantum criticality in Ce2PdIn8: thermoelectric study
• The thermopower as a fingerprint of the Kondo breakdown quantum critical point
• Enhanced Seebeck coefficient through the magnetic fluctuations in Sr${}_2$Ru${}_{1-x}{M}_x$O${}_4$ ($M=$ Co, Mn)
• Quantum Hall interferometry in triangular domains of marginally twisted bilayer graphene
• Crossover between Fermi liquid and non-Fermi liquid behavior in the non-centrosymmetric compound Yb${}_2$Ni${}_{12}$P${}_7$
• Excess entropy and breakdown of semiclassical description of thermoelectricity in twisted bilayer graphene close to half filling
• Low-temperature thermopower study of YbRh2Si2
• Carrier-doping effect and anomalous transport properties in Ni-doped CeCoIn5 investigated by Hall resistivity measurements