Evidence of Fermi-Surface Reconstruction at the Metamagnetic Transition of the Strongly Correlated Superconductor UTe2

Abstract

Thermoelectric power ($S$) and Hall effect ($R_{\mathrm{H}}$) measurements on the paramagnetic superconductor UTe${}_2$ with magnetic field applied along the hard magnetization $b$-axis are reported. The first order nature of the metamagnetic transition at $H_{\mathrm{m}}=H_{c2}^b=35$~T leads to drastic consequences on $S$ and $R_{\mathrm{H}}$. In contrast to the field dependence of the specific heat in the normal state through $H_{\mathrm{m}}$, $S(H)$ is not symmetric with respect to $H_{\mathrm{m}}$. This implies a strong interplay between ferromagnetic (FM) fluctuations and a Fermi-surface reconstruction at $H_{\mathrm{m}}$. $R_{\mathrm{H}}$ is very well described by incoherent skew scattering above the coherence temperature $T_{\mathrm{m}}$ corresponding roughly to the temperature of the maximum in the susceptibility $T_{{\chi }_{\max }}$ and coherent skew scattering at lower temperatures. The discontinuous field dependence of both, $S(H)$ and the ordinary Hall coefficient $R_0$, at $H_{\mathrm{m}}$ and at low temperature, provides evidence of a change in the band structure at the Fermi level.

arXiv comment5 figures in the main text; 9 figures in the supplemental material

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Cited by in corpus (27)

• Unconventional Superconductivity in UTe2
• Field-induced tuning of the pairing state in a superconductor
• Comparison of two superconducting phases induced by a magnetic field in UTe2
• Quasi-2D Fermi surface in the anomalous superconductor UTe2
• $c$-axis transport in UTe${}_2$: Evidence of Three Dimensional Conductivity Component
• A review of UTe${}_2$ at high magnetic fields
• Revealing a 3D Fermi Surface Pocket and Electron-Hole Tunneling in UTe${}_2$ with Quantum Oscillations
• Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2
• Enhancement and Discontinuity of Effective Mass through the First-Order Metamagnetic Transition in UTe${}_2$
• Expansion of the high field-boosted superconductivity in UTe2 under pressure
• Field-induced compensation of magnetic exchange as the possible origin of reentrant superconductivity in UTe${}_2$
• Magnetic reshuffling and feedback on superconductivity in UTe2 under pressure
• Pressure-induced structural phase transition and new superconducting phase in UTe2
• Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe${}_2$
• Hall anomaly, Quantum Oscillations and Possible Lifshitz Transitions in Kondo Insulator YbB${}_{12}$: Evidence for Unconventional Charge Transport
• Anisotropic signatures of the electronic correlations in the electrical resistivity of UTe${}_2$
• c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
• Metamagnetic phase transition in ferromagnetic superconductor URhGe
• Anisotropic field-induced changes in the superconducting order parameter of UTe2
• Fermi-surface reconstruction at the metamagnetic high-field transition in uranium mononitride
• Field-angle evolution of the superconducting and magnetic phases of UTe${}_2$ around the $b$ axis
• Dramatic elastic response at the critical end point in UTe${}_2$
• Signatures of two ferromagnetic states and goniopolarity in LaCrGe3 in the Hall effect
• Slow magnetic quantum oscillations in the c-axis magnetoresistance of UTe${}_2$
• Pauli 'unlimited': magnetic field induced-superconductivity in UTe${}_2$
• Metamagnetic transition in the two $f$ orbitals Kondo lattice model
• Boosted magnetic fluctuations at the onset of superconductivity in UTe${}_2$ beyond 40 T