The electronic thermal transport in the EuBa2Cu3Oy superconductor

Matusiak, Marcin; Wolf, Th.

doi:10.1016/j.physc.2005.07.006

Cited by 2 publications

(1 citation statement)

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“…However, the usefulness of WF law is restricted by the fact that κ el is often only a small fraction of the total thermal conductivity and, moreover, there are circumstances in which the Lorenz number is no longer equal to L 0 . The most trivial reason is inelastic scattering of charge carriers by phonons that reduces value of L , another is a pseudogap, which emerges in the normal state of some unconventional superconductors , which causes an enhancement of L above L 0 . A very small Fermi energy will also cause an increase of L .…”

Section: Resultsmentioning

confidence: 99%

Wiedemann-Franz law in iron-based superconductor Fe_1+dTe_1−xSe_x

Matusiak

Babij

Pomjakushina

et al. 2016

Phys. Status Solidi B

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We present results of measurements of the transport phenomena in the series of Fe1+dTe1−xSex single crystals. Namely, we investigate the longitudinal and transverse electrical and thermal conductivities in the parent compound Fe1+dTe as well as superconducting Fe1+dTe0.85Se0.15 and Fe1+dTe0.59Se0.41. This set of data allows us to verify validity of the Wiedemann–Franz law in the systems studied and consequently it is stated that the electronic system in the paramagnetic phase of Fe1+dTe behaves like the Fermi liquid being predominantly elastically scattered. In contrast, low temperature properties of Fe1+dTe0.85Se0.15 and Fe1+dTe0.59Se0.41 are affected likely by the emergence of antiferromagnetic fluctuations, which are expected to be (π,0) and (π,π), respectively. These seem to be coupled with the hole‐like band in case of Fe1+dTe0.85Se0.15, whereas with the electron‐like band in case of Fe1+dTe0.59Se0.41.

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Section: Resultsmentioning

confidence: 99%