Microscopic imaging homogeneous and single phase superfluid density in UTe${}_2$

Abstract

The spin-triplet superconductor UTe${}_2$ shows spontaneous time-reversal symmetry breaking and multiple superconducting phases in some crystals, implying chiral superconductivity. Here we microscopically image the local magnetic fields and magnetic susceptibility near the surface of UTe${}_2$, observing a homogeneous superfluid density $n_s$ and homogeneous pinned vortices. The temperature dependence of $n_s$ is consistent with an anisotropic gap and shows no evidence for an additional kink that would be expected at any second phase transition. Our findings are consistent with a dominant $B_{3u}$ superconducting order parameter in the case of a quasi-2D Fermi surface and provide no evidence for multiple phase transitions in $n_s(T)$ in UTe${}_2$.

arXiv comment12 pages, 13 figures

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Cited by in corpus (21)

• Quasi-2D Fermi surface in the anomalous superconductor UTe2
• Single-Component Superconductivity in UTe${}_2$ at Ambient Pressure
• A review of UTe${}_2$ at high magnetic fields
• The fate of time-reversal symmetry breaking in UTe2
• Fully gapped pairing state in spin-triplet superconductor UTe${}_2$
• Pair Wavefunction Symmetry in UTe2 from Zero-Energy Surface State Visualization
• Theory of the low- and high-field superconducting phases of UTe${}_2$
• Observation of Persistent Zero Modes and Superconducting Vortex Doublets in UTe${}_2$
• Spectroscopic evidence of symmetry breaking in the superconducting vortices of UTe2
• Nodal superconducting gap structure and topological surface states of UTe${}_2$
• Pair-Kondo effect: a mechanism for time-reversal broken superconductivity in UTe${}_2$
• Magnetic signatures of pressure-induced multicomponent superconductivity in UTe${}_2$
• Quasiparticle interference and spectral function of the UTe${}_2$ superconductive surface band
• Anomalous superfluid density in a disordered charge density wave material: Pd-intercalated ErTe${}_3$
• Microscopic theory of pair density waves in spin-orbit coupled Kondo lattice
• Observation of vortex stripes in UTe${}_2$
• Magnetic edge fields in UTe${}_2$ near zero background fields
• Revealing isotropic abundant low-energy excitations in UTe${}_2$ through complex microwave surface impedance
• Visualizing the Odd-parity Superconducting Order Parameter and its Quasiparticle Surface Band in UTe2
• Observation of field-odd and field-free superconducting diode effects in ${\mathrm{Mo}}_2\mathrm{C}$ nanoflakes
• Signature of chiral superconducting order parameter evidenced in mesoscopic superconductors