Metamagnetism in the high-pressure tetragonal phase of UTe$_2$
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866915350991339520 |
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| author | Thebault, T. Braithwaite, D. Lapertot, G. Aoki, D. Knebel, G. Knafo, W. |
| author_facet | Thebault, T. Braithwaite, D. Lapertot, G. Aoki, D. Knebel, G. Knafo, W. |
| contents | A structural orthorhombic-to-tetragonal phase transition was recently discovered in the heavy-fermion compound UTe$_2$ at a pressure $p^*\simeq3-8$~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 $μ_0H=58$~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 $μ_0H_{x1}=24$~T and $μ_0H_{x2}=34$~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 $T_x$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_20277 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Metamagnetism in the high-pressure tetragonal phase of UTe$_2$ Thebault, T. Braithwaite, D. Lapertot, G. Aoki, D. Knebel, G. Knafo, W. Strongly Correlated Electrons Superconductivity A structural orthorhombic-to-tetragonal phase transition was recently discovered in the heavy-fermion compound UTe$_2$ at a pressure $p^*\simeq3-8$~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 $μ_0H=58$~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 $μ_0H_{x1}=24$~T and $μ_0H_{x2}=34$~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 $T_x$. |
| title | Metamagnetism in the high-pressure tetragonal phase of UTe$_2$ |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2403.20277 |