c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
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| Format: | Preprint |
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2023
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| author | Knebel, G. Pourret, A. Rousseau, S. Marquardt, N. Braithwaite, D. Honda, F. Aoki, D. Lapertot, G. Knafo, W. Seyfarth, G. Brison, J-P. Flouquet, J. |
| author_facet | Knebel, G. Pourret, A. Rousseau, S. Marquardt, N. Braithwaite, D. Honda, F. Aoki, D. Lapertot, G. Knafo, W. Seyfarth, G. Brison, J-P. Flouquet, J. |
| contents | The electrical resistivity of the unconventional superconductor UTe$_2$ shows very anisotropic behavior in the normal state depending on the current direction. In the present paper we show that the maximum in the resistivity $ρ_c$ for current applied along the $c$ axis at $T^{\rm max}_{ρ_c} \approx 14.75$~K follows the minimum in the thermal expansion $T_α^\star$ along $b$ axis. Under a magnetic field applied along the $b$ axis, $T^{\rm max}_{ρ_c}$ can be tracked up to the critical point of the first order metamagnetic transition, which is located near 6~K and 34.5~T. Surprisingly, at the metamagnetic field $H_m$ the resistivity $ρ_c$ shows a steplike decrease while the resistivities $ρ_a$ and $ρ_b$, for current along the $a$ and $b$ axis, respectively, show a steplike increase. Under hydrostatic pressure $T^{\rm max}_{ρ_c}$ and $H_m$ decrease significantly up to the critical pressure $p_c$ at which superconductivity is suppressed and a long range antiferromagnetic order appears. We show that the phase diagram at different pressures can be scaled by $T^{\rm max}_{ρ_c}$ in field and temperature suggesting that this temperature scale is governing the main interactions in the normal state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_16273 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure Knebel, G. Pourret, A. Rousseau, S. Marquardt, N. Braithwaite, D. Honda, F. Aoki, D. Lapertot, G. Knafo, W. Seyfarth, G. Brison, J-P. Flouquet, J. Strongly Correlated Electrons Superconductivity The electrical resistivity of the unconventional superconductor UTe$_2$ shows very anisotropic behavior in the normal state depending on the current direction. In the present paper we show that the maximum in the resistivity $ρ_c$ for current applied along the $c$ axis at $T^{\rm max}_{ρ_c} \approx 14.75$~K follows the minimum in the thermal expansion $T_α^\star$ along $b$ axis. Under a magnetic field applied along the $b$ axis, $T^{\rm max}_{ρ_c}$ can be tracked up to the critical point of the first order metamagnetic transition, which is located near 6~K and 34.5~T. Surprisingly, at the metamagnetic field $H_m$ the resistivity $ρ_c$ shows a steplike decrease while the resistivities $ρ_a$ and $ρ_b$, for current along the $a$ and $b$ axis, respectively, show a steplike increase. Under hydrostatic pressure $T^{\rm max}_{ρ_c}$ and $H_m$ decrease significantly up to the critical pressure $p_c$ at which superconductivity is suppressed and a long range antiferromagnetic order appears. We show that the phase diagram at different pressures can be scaled by $T^{\rm max}_{ρ_c}$ in field and temperature suggesting that this temperature scale is governing the main interactions in the normal state. |
| title | c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2306.16273 |