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Magnetic edge fields in UTe 2 near zero background fields

Iguchi, Yusuke [Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Stanford University] (ORCID:0000000196954586)·Man, Huiyuan [Stanford Univ., CA (United States)] (ORCID:0000000265942651)·Thomas, S. M. [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000308894435)·Ronning, Filip [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000226797957)·Ishizuka, Jun [Niigata Univ. (Japan); Eidgenoessische Technische Hochschule (ETH), Zurich (Switzerland)] (ORCID:0000000175657451)·Sigrist, Manfred [Eidgenoessische Technische Hochschule (ETH), Zurich (Switzerland)] (ORCID:0000000286275093)·Rosa, Priscila F. S. [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:000000023437548X)·Moler, Kathryn A. [Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)] (ORCID:0000000202338123)
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Abstract

Chiral superconductors are theorized to exhibit spontaneous edge currents. Here, in this study, we found magnetic fields at the edges of UTe 2 , 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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75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITYchiral edge statechiral superconductivitytopological superconductivity

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Iguchi, Yusuke [Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Stanford University] (ORCID:0000000196954586), Man, Huiyuan [Stanford Univ., CA (United States)] (ORCID:0000000265942651), Thomas, S. M. [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000308894435), Ronning, Filip [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000226797957), Ishizuka, Jun [Niigata Univ. (Japan); Eidgenoessische Technische Hochschule (ETH), Zurich (Switzerland)] (ORCID:0000000175657451), Sigrist, Manfred [Eidgenoessische Technische Hochschule (ETH), Zurich (Switzerland)] (ORCID:0000000286275093), Rosa, Priscila F. S. [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:000000023437548X), Moler, Kathryn A. [Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)] (ORCID:0000000202338123). 2024-12-04. Magnetic edge fields in UTe 2 near zero background fields. https://doi.org/10.1103/physrevb.110.214505

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