Revealing a 3D Fermi Surface Pocket and Electron-Hole Tunneling in UTe${}_2$ with Quantum Oscillations

Abstract

Spin triplet superconductor UTe${}_2$ is widely believed to host a quasi-two-dimensional Fermi surface, revealed by first principal calculations, photoemission and quantum oscillation measurements. An outstanding question still remains as to the existence of a three-dimensional Fermi surface pocket, which is crucial for our understanding of the exotic superconducting and topological properties of UTe${}_2$. This 3D Fermi surface pocket appears in various theoretical models with different physics origins but has not been detected experimentally. Here for the first time, we provide concrete evidence for a relatively isotropic, small Fermi surface pocket of UTe${}_2$ via quantum oscillation measurements. In addition, we observed high frequency quantum oscillations corresponding to electron-hole tunneling between adjacent electron and hole pockets. The coexistence of 2D and 3D Fermi surface pockets, as well as the breakdown orbits, provides a test bed for theoretical models and aid the realization of a unified understanding of superconducting state of UTe${}_2$ from the first-principles approach.

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Cited by in corpus (23)

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• Single-Component Superconductivity in UTe${}_2$ at Ambient Pressure
• A review of UTe${}_2$ at high magnetic fields
• Quantum interference between quasi-2D Fermi surface sheets in UTe2
• Anomalous vortex dynamics in spin-triplet superconductor UTe${}_2$
• Pair Wavefunction Symmetry in UTe2 from Zero-Energy Surface State Visualization
• Odd-Parity Quasiparticle Interference in the Superconductive Surface State of UTe2
• Thermodynamic transitions and topology of spin-triplet superconductivity: Application to UTe${}_2$
• c axis electrical transport at the metamagnetic transition in the heavy-fermion superconductor UTe2 under pressure
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• Incommensurate antiferromagnetism in UTe2 under pressure
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• Observation of vortex stripes in UTe${}_2$
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• Pauli 'unlimited': magnetic field induced-superconductivity in UTe${}_2$
• Revealing isotropic abundant low-energy excitations in UTe${}_2$ through complex microwave surface impedance
• Pressure-enhanced $f$-electron orbital weighting in UTe2 mapped by quantum interferometry
• Electronic structure of UTe${}_2$ under pressure