Evidence of Fermi surface reconstruction at the metamagnetic transition of the strongly correlated superconductor UTe2

Q. Niu, G. Knebel, D. Braithwaite, D. Aoki, G. Lapertot, M. Vališka, G. Seyfarth, W. Knafo, T. Helm, J. P. Brison, J. Flouquet, A. Pourret

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Thermoelectric power (S) and Hall effect (RH) measurements on the paramagnetic superconductor UTe2 with the magnetic field applied along the hard magnetization b axis are reported. The first-order nature of the metamagnetic transition at Hm=Hc2b=35 T leads to drastic consequences on S and RH. In contrast to the field dependence of the specific heat in the normal state through Hm, S(H) is not symmetric with respect to Hm. This implies a strong interplay between ferromagnetic fluctuations and a Fermi-surface reconstruction at Hm. RH is very well described by incoherent skew scattering above the coherence temperature Tm corresponding roughly to the temperature of the maximum in the susceptibility Tχmax and coherent skew scattering at lower temperatures. The discontinuous field dependence of both S(H) and the ordinary Hall coefficient R0, at Hm and at low temperature, provides evidence of a change in the band structure at the Fermi level.

Original languageEnglish
Article number033179
JournalPhysical Review Research
Volume2
Issue number3
DOIs
Publication statusPublished - 2020 Aug

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'Evidence of Fermi surface reconstruction at the metamagnetic transition of the strongly correlated superconductor UTe2'. Together they form a unique fingerprint.

Cite this