Local observation of linear-$T$ superfluid density and anomalous vortex dynamics in URu${}_2$Si${}_2$

Abstract

The heavy fermion superconductor URu${}_2$Si${}_2$ is a candidate for chiral, time-reversal symmetry-breaking superconductivity with a nodal gap structure. Here, we microscopically visualized superconductivity and spatially inhomogeneous ferromagnetism in URu${}_2$Si${}_2$. We observed linear-$T$ superfluid density, consistent with d-wave pairing symmetries including chiral d-wave, but did not observe the spontaneous magnetization expected for chiral d-wave. Local vortex pinning potentials had either four- or two-fold rotational symmetries with various orientations at different locations. Taken together, these data support a nodal gap structure in URu${}_2$Si${}_2$ and suggest that chirality either is not present or does not lead to detectable spontaneous magnetization.

References in corpus (14)

• Magnetic Penetration Depth in Unconventional Superconductors
• Rotational Symmetry Breaking in the Hidden-Order Phase of URu2Si2
• Exotic Superconducting Properties in the Electron-Hole Compensated Heavy Fermion `Semimetal' URu2Si2
• Emergent Rank-5 'Nematic' Order in URu2Si2
• Evidence for broken time-reversal symmetry in the superconducting phase of URu${}_2$Si${}_2$
• Orbital Angular Momentum and Spectral Flow in Two Dimensional Chiral Superfluids
• Colossal thermomagnetic response in the exotic superconductor URu2Si2
• Direct observation of lattice symmetry breaking at the hidden-order transition in URu2Si2
• Cyclotron Resonance in the Hidden-Order Phase of URu2Si2
• Competition between hidden order and antiferromagnetism in URu_2Si_2 under uniaxial stress studied by neutron scattering
• Flux Line Lattice Melting and the Formation of a Coherent Quasiparticle Bloch State in the Ultraclean URu${}_2$Si${}_2$ Superconductor
• Broken symmetries in URu2Si2
• Pressure-Induced Rotational Symmetry Breaking in URu${}_2$Si${}_2$
• Magnetic fields above the surface of a superconductor with internal magnetism

Cited by in corpus (10)

• Observation of superconducting vortices carrying a temperature-dependent fraction of the flux quantum
• Quantum-well states at the surface of the heavy-fermion superconductor URu${}_2$Si${}_2$
• Coreless vortices as direct signature of chiral $d$-wave superconductivity
• Robust and tunable coreless vortices and fractional vortices in chiral $d$-wave superconductors
• Enhanced chiral edge currents and orbital magnetic moment in chiral $d$-wave superconductors from mesoscopic finite-size effects
• Vortex dynamics induced by scanning SQUID susceptometry
• Anomalous superfluid density in a disordered charge density wave material: Pd-intercalated ErTe${}_3$
• Magnetic edge fields in UTe${}_2$ near zero background fields
• Designing edge currents using mesoscopic patterning in chiral d-wave superconductors
• Signature of chiral superconducting order parameter evidenced in mesoscopic superconductors