6533b833fe1ef96bd129bfd8

RESEARCH PRODUCT

Violation of the Wiedemann-Franz Law in HF Metals

Vasily R. ShaginyanVladimir A. StephanovichKonstantin G. PopovMiron Amusia

subject

PhysicsResidual resistivityCondensed matter physicsElectrical resistivity and conductivitySeebeck coefficientLorenz numberFermi liquid theoryFlat bandWiedemann–Franz lawPhase diagram

description

Experimental observations of the much-studied compounds CeCoIn\(_5\) and YbRh\(_2\)Si\(_2\) at vanishing temperatures carefully probe the nature of their magnetic-field-tuned QCPs. The violation of Wiedemann-Franz (WF) law, along with jumps revealed both in the residual resistivity \(\rho _0\) and the Hall resistivity \(R_H\), provide vital clues to the origin of their non-Fermi-liquid behavior. The empirical facts point unambiguously to association of the observed QCP with FC forming flat bands.

yearjournalcountryeditionlanguage
2014-10-26
https://doi.org/10.1007/978-3-319-10825-4_14