Magnetic edge fields in UTe2 near zero background fields

Iguchi, Yusuke; Man, Huiyuan; Thomas, S. M.; Ronning, Filip; Ishizuka, Jun; Sigrist, Manfred; Rosa, Priscila F. S.; Moler, Kathryn A.

doi:10.1103/physrevb.110.214505

Title: Magnetic edge fields in UTe₂ near zero background fields

Journal Article · 03 December 2024 · Physical Review. B

DOI: https://doi.org/10.1103/physrevb.110.214505 · OSTI ID:2479892

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Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Stanford University
Stanford Univ., CA (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Niigata Univ. (Japan); Eidgenoessische Technische Hochschule (ETH), Zurich (Switzerland)
Eidgenoessische Technische Hochschule (ETH), Zurich (Switzerland)
Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Chiral superconductors are theorized to exhibit spontaneous edge currents. Here, in this study, we found magnetic fields at the edges of UTe₂, a candidate odd-parity chiral superconductor, that seem to agree with predictions for a chiral order parameter. However, we did not detect the chiral domains that would be expected, and recent polar Kerr and muon spin relaxation data in nominally clean samples argue against chiral superconductivity. Our results show that hidden sources of magnetism must be carefully ruled out when using spontaneous edge currents to identify chiral superconductivity.

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Research Organization:: Stanford Univ., CA (United States)

Sponsoring Organization:: National Science Foundation (NSF); Swiss National Science Foundation (SNSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 2479892

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 21 Vol. 110; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Magnetic edge fields in UTe2 near zero background fields

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Title: Magnetic edge fields in UTe₂ near zero background fields