First Observation of de Haas-van Alphen Effect and Fermi Surfaces in Unconventional Superconductor UTe2

Abstract

We report the first observation of the de Haas-van Alphen (dHvA) effect in the novel spin-triplet superconductor UTe2 using high quality single crystals with the high residual resistivity ratio (RRR) over 200. The dHvA frequencies, named alpha and beta, are detected for the field directions between c and a-axes. The frequency of branch beta increases rapidly with the field angle tilted from c to a-axis, while branch alpha splits, owing to the maximal and minimal cross-sectional areas from the same Fermi surface. Both dHvA branches, alpha and beta reveal two kinds of cylindrical Fermi surfaces with a strong corrugation at least for branch alpha. The angular dependence of the dHvA frequencies is in very good agreement with that calculated by the generalized gradient approximation (GGA) method taking into account the on-site Coulomb repulsion of U = 2 eV, indicating the main Fermi surfaces are experimentally detected. The detected cyclotron effective masses are large in the range from 32 to 57 m0 . They are approximately 10-20 times lager than the corresponding band masses, consistent with the mass enhancement obtained from the Sommerfeld coefficient and the calculated density of states at the Fermi level. The local density approximation (LDA) calculations of ThTe2 assuming U4+ with the 5f^2 localized model are in less agreement with our experimental results, in spite of the prediction for two cylindrical Fermi surfaces, suggesting a mixed valence states of U4+ and U3+ in UTe2.

7 pages, 8 figures, submitted to J. Phys. Soc. Jpn

References in corpus (13)

• Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor
• Unconventional Superconductivity in Heavy Fermion UTe2
• Review of U-based Ferromagnetic Superconductors: Comparison between UGe2, URhGe, and UCoGe
• Unconventional Superconductivity in UTe2
• Multiple Superconducting Phases and Unusual Enhancement of the Upper Critical Field in UTe2
• Low energy band structure and symmetries of UTe2 from angle resolved photoemission spectroscopy
• Single-component superconducting state in UTe2 at 2 K
• Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe${}_2$
• Anisotropic response of spin susceptibility in the superconducting state of UTe${}_2$ probed with ${}^{125}$Te-NMR measurement
• Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2
• UTe${}_2$: a nearly insulating half-filled $j=\frac{5}{2}$ $5f^3$ heavy fermion metal
• Core-Level Photoelectron Spectroscopy Study of UTe${}_2$
• Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe${}_2$

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• Field Induced Multiple Superconducting Phases in UTe2 along Hard Magnetic Axis
• Enhanced triplet superconductivity in next generation ultraclean UTe2
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• Ubiquitous Spin Freezing in the Superconducting State of UTe2
• Field-induced compensation of magnetic exchange as the possible origin of reentrant superconductivity in UTe${}_2$
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• Pressure-induced structural phase transition and new superconducting phase in UTe2
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• Pairing symmetries of multiple superconducting phases in UTe2: Competition between ferromagnetic and antiferromagnetic fluctuations
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• Pair Wavefunction Symmetry in UTe2 from Zero-Energy Surface State Visualization
• Metastable phase of UTe${}_2$ formed under high pressure above 5 GPa
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• Anisotropic Enhancement of Lower Critical Field in Ultraclean Crystals of Spin-Triplet Superconductor UTe2
• c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
• Quantifying the U $5f$ covalence and degree of localization in U intermetallics
• Incommensurate antiferromagnetism in UTe2 under pressure
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• Reinforcement of superconductivity by quantum critical fluctuations of metamagnetism in UTe${}_2$
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• An emerging global picture of heavy fermion physics
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• Nodal Superconductivity of UTe${}_2$ Probed by Field-Angle-Resolved Specific Heat on a Crystal with $T_{\mathrm{c}}=2.1$ K
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• Electronic structure of UTe${}_2$ under pressure
• Boosted magnetic fluctuations at the onset of superconductivity in UTe${}_2$ beyond 40 T
• Theoretical Study of Impurity Effects on Superconductivity in UTe2
• Raman response of collective modes in multicomponent superconductors
• Pressure-enhanced $f$-electron orbital weighting in UTe2 mapped by quantum interferometry
• Quasi-two-dimensional Fermi surfaces of the antiferromagnet U${}_2$RhIn${}_8$ revealed by de Haas-van Alphen measurements