Supplementary material for the PRL submitted paper of ”Violation of Wiedemann-Franz law at the Kondo breakdown quantum critical point” : Quantum Boltzman equation study
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ar X iv : c on d - m at / 0 51 05 97 v 2 17 J an 2 00 7 Thermoelectric transport near the pair breaking quantum phase transition out of a d - wave superconductor
We study electric, thermal, and thermoelectric conductivities in the vicinity of a z = 2 superconductor-diffusive metal transition in two dimensions, both in the high and low frequency limits. We find violation of the Wiedemann-Franz law and a dc thermoelectric conductivity α that does not vanish at low temperatures, in contrast to Fermi liquids. We introduce a Langevin equation formalism to st...
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A quantum critical point transforms the behavior of electrons so strongly that new phases of matter can emerge. The interactions at play are known to fall outside the scope of the standard model of metals, but a fundamental question remains: Is the basic concept of a quasiparticle-a fermion with renormalized mass-still valid in such systems? The Wiedemann-Franz law, which states that the ratio ...
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The temperature dependences of the interlayer electrical and thermal resistivity in a layered metal are calculated for Fermi liquid quasiparticles which are scattered inelastically by two-dimensional antiferromagnetic spin fluctuations. Both resistivities have a linear temperature dependence over a broad temperature range. Extrapolations to zero temperature made from this linear-T range give va...
متن کاملFailure of the Wiedemann-Franz law in mesoscopic conductors
We study the effect of mesoscopic fluctuations on the validity of the Wiedemannn-Franz WF law for quasi-one-dimensional metal wires and open quantum dots. At temperatures much less than the generalized Thouless energy, Ec, the WF law is satisfied for each specific sample, but as the temperature is raised through Ec, a sample-specific correction to the WF law of order 1/g appears g is the dimens...
متن کاملAbstract Submitted for the MAR08 Meeting of The American Physical Society Finite-temperature conductance signatures of a quantum-critical transition in a double quantum-dot device1
Submitted for the MAR08 Meeting of The American Physical Society Finite-temperature conductance signatures of a quantum-critical transition in a double quantum-dot device1 NANCY SANDLER, Ohio University, LUIS DIAS DA SILVA, Oak Ridge Natl. Lab. and U. of Tennessee, KEVIN INGERSENT, U. of Florida, SERGIO ULLOA, Ohio University — We present conductance results for a quantum-dot system containing ...
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تاریخ انتشار 2009