Metamagnetism in the high-pressure tetragonal phase of UTe$_2$

T. Thebault; D. Braithwaite; G. Lapertot; D. Aoki; G. Knebel; W. Knafo

doi:10.1103/PhysRevB.109.214420

paper

Metamagnetism in the high-pressure tetragonal phase of UTe $_{2}$

arXiv:2403.20277 · doi:10.1103/PhysRevB.109.214420

Abstract

A structural orthorhombic-to-tetragonal phase transition was recently discovered in the heavy-fermion compound UTe $_{2}$ at a pressure $p^{*} ≃ 3 - 8$ ~GPa [Honda \textit{et al.}, J. Phys. Soc. Jpn. \textbf{92}, 044702 (2023); Huston \textit{et al.}, Phys. Rev. Mat. \textbf{6}, 114801 (2022)]. In the high-pressure tetragonal phase, a phase transition at $T_{x} = 235$ ~K and a superconducting transition at $T_{sc} = 2$ ~K have been revealed. In this work, we present an electrical-resistivity study of UTe $_{2}$ in pulsed magnetic fields up to $μ_{0} H = 58$ ~T combined with pressures up to $p$ = 6 GPa. The field was applied in a direction tilted by 30~ $^{\circ}$ ~from \textbf{b} to \textbf{c} in the orthogonal structure, which is identified as the direction \textbf{c} of the tetragonal structure. In the tetragonal phase, the presence of superconductivity is confirmed and signatures of metamagnetic transitions are observed at the fields $μ_{0} H_{x 1} = 24$ ~T and $μ_{0} H_{x 2} = 34$ ~T and temperatures smaller than $T_{x}$ . We discuss the effects of uniaxial pressure and we propose that a magnetic ordering drives the transition at $T_{x}$ .

13 pages, 11 figures, Supplemental Material: 18 pages, 17 figures

Metamagnetism in the high-pressure tetragonal phase of UTe $_{2}$

Abstract

References in corpus (37)

Cited by in corpus (2)

Metamagnetism in the high-pressure tetragonal phase of UTe2​

Abstract

References in corpus (37)

Cited by in corpus (2)

Metamagnetism in the high-pressure tetragonal phase of UTe $_{2}$