Naslov
Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1-xSx

Autori
Huang, WK ; Hosoi, S ; Čulo, Matija ; Kasahara, S ; Sato, Y ; Matsuura, K ; Mizukami, Y ; Berben, M ; Hussey, NE ; Kontani, H ; Shibauchi, T ; Matsuda, Y ;

Izvornik
Physical review research (2643-1564) 2 (2020); 033367, 7

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
strange metal ; Fermi liquid ; quantum critical point ; nematic order ; Planckian limit ; Hall angle ; magnetoresistance ; critical fluctuations

Sažetak
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 ρxx ∝ T, which is close to the Planckian limit, the Hall angle varies as cot θH ∝ T 2 and the low-field magnetoresistance is well scaled as Delta ρxx/ρxx ∝ tan2 θH 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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