Microscopic Imaging Homogeneous and Single Phase Superfluid Density in $\mathrm{UTe_2}$

Iguchi, Yusuke; Man, Huiyuan; Thomas, Sean M.; Ronning, Filip; Rosa, Priscila F. S.; Moler, Kathryn A.

doi:10.1103/physrevlett.130.196003

Microscopic Imaging Homogeneous and Single Phase Superfluid Density in $$\mathrm{UTe_2}$$

Journal Article · Fri May 12 00:00:00 EDT 2023 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.130.196003· OSTI ID:2001174

^[1]; ^[2]; ^[3]; Ronning, Filip ^[3]; ^[3]; ^[4]

Stanford University, CA (United States). Geballe Laboratory for Advanced Materials; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Geballe Laboratory for Advanced Materials, Stanford University
Stanford University, CA (United States). Geballe Laboratory for Advanced Materials
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Stanford University, CA (United States). Geballe Laboratory for Advanced Materials; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Odd-parity superconductor $$\mathrm{UTe_2}$$ shows spontaneous time-reversal symmetry breaking and multiple superconducting phases, which imply chiral superconductivity, but only in a subset of samples. Here, we microscopically observe a homogeneous superfluid density $$n_s$$ on the surface of $$\mathrm{UTe_2}$$ and an enhanced superconducting transition temperature near the edges. We also detect vortex-antivortex pairs even at zero magnetic field, indicating the existence of a hidden internal field. The temperature dependence of $$n_s$$, determined independent of sample geometry, does not support point nodes along the $$b$$ axis for a quasi-2D Fermi surface and provides no evidence for multiple phase transitions in $$\mathrm{UTe_2}$$.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Stanford University, CA (United States). Geballe Laboratory for Advanced Materials

Sponsoring Organization:: U.S. Department of Energy; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: 89233218CNA000001; AC02-76SF00515

OSTI ID:: 2001174

Alternate ID(s):: OSTI ID: 2205045

Report Number(s):: LA-UR--22-31555

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 130; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Microscopic Imaging Homogeneous and Single Phase Superfluid Density in $$\mathrm{UTe_2}$$

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