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Anomalous normal fluid response in a chiral superconductor UTe2.
Bae, Seokjin; Kim, Hyunsoo; Eo, Yun Suk; Ran, Sheng; Liu, I-Lin; Fuhrman, Wesley T; Paglione, Johnpierre; Butch, Nicholas P; Anlage, Steven M.
Afiliación
  • Bae S; Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA. sjbae@terpmail.umd.edu.
  • Kim H; Materials Research Laboratory, University of Illinois Urbana-Champaign, Urbana, IL, USA. sjbae@terpmail.umd.edu.
  • Eo YS; Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA.
  • Ran S; Department of Physics and Astronomy, Texas Tech University, Lubbock, TX, USA.
  • Liu IL; Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA.
  • Fuhrman WT; Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA.
  • Paglione J; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, USA.
  • Butch NP; Department of Physics, Washington University, St. Louis, MO, USA.
  • Anlage SM; Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, USA.
Nat Commun ; 12(1): 2644, 2021 May 11.
Article en En | MEDLINE | ID: mdl-33976162
Chiral superconductors have been proposed as one pathway to realize Majorana normal fluid at its boundary. However, the long-sought 2D and 3D chiral superconductors with edge and surface Majorana normal fluid are yet to be conclusively found. Here, we report evidence for a chiral spin-triplet pairing state of UTe2 with surface normal fluid response. The microwave surface impedance of the UTe2 crystal was measured and converted to complex conductivity, which is sensitive to both normal and superfluid responses. The anomalous residual normal fluid conductivity supports the presence of a significant normal fluid response. The superfluid conductivity follows the temperature behavior predicted for an axial spin-triplet state, which is further narrowed down to a chiral spin-triplet state with evidence of broken time-reversal symmetry. Further analysis excludes trivial origins for the observed normal fluid response. Our findings suggest that UTe2 can be a new platform to study exotic topological excitations in higher dimension.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido