Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1-x Sx

W. K. Huang, S. Hosoi, M. Čulo, S. Kasahara, Y. Sato, K. Matsuura, Y. Mizukami, M. Berben, N. E. Hussey, H. Kontani, T. Shibauchi, Y. Matsuda

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9 Citations (Scopus)

Abstract

Non-Fermi liquids are strange metals whose physical properties deviate qualitatively from those of conventional metals due to strong quantum fluctuations. In this paper, we report transport measurements on the FeSe1-xSx superconductor, which has a quantum critical point of a nematic order without accompanying antiferromagnetism. We find that in addition to a linear-in-temperature resistivity ρxxa T, which is close to the Planckian limit, the Hall angle varies as cotθHa T2 and the low-field magnetoresistance is well scaled as Δρxx/ρxxa tan2θH in the vicinity of the nematic quantum critical point. This set of anomalous charge transport properties show striking resemblance with those reported in cuprate, iron-pnictide, and heavy fermion superconductors, demonstrating that the critical fluctuations of a nematic order with q≈0 can also lead to a breakdown of the Fermi liquid description.

Original languageEnglish
Article number033367
JournalPhysical Review Research
Volume2
Issue number3
DOIs
Publication statusPublished - Sep 2020
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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