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Single-electron charge transfer into putative Majorana and trivial modes in individual vortices.
Ge, Jian-Feng; Bastiaans, Koen M; Chatzopoulos, Damianos; Cho, Doohee; Tromp, Willem O; Benschop, Tjerk; Niu, Jiasen; Gu, Genda; Allan, Milan P.
Afiliación
  • Ge JF; Leiden Institute of Physics, Leiden University, 2333 CA, Leiden, The Netherlands.
  • Bastiaans KM; Leiden Institute of Physics, Leiden University, 2333 CA, Leiden, The Netherlands.
  • Chatzopoulos D; Department of Quantum Nanoscience, Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
  • Cho D; Leiden Institute of Physics, Leiden University, 2333 CA, Leiden, The Netherlands.
  • Tromp WO; Department of Physics, Yonsei University, Seoul, 03722, Republic of Korea.
  • Benschop T; Leiden Institute of Physics, Leiden University, 2333 CA, Leiden, The Netherlands.
  • Niu J; Leiden Institute of Physics, Leiden University, 2333 CA, Leiden, The Netherlands.
  • Gu G; Leiden Institute of Physics, Leiden University, 2333 CA, Leiden, The Netherlands.
  • Allan MP; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY, 11973, USA.
Nat Commun ; 14(1): 3341, 2023 Jun 08.
Article en En | MEDLINE | ID: mdl-37286552
Majorana bound states are putative collective excitations in solids that exhibit the self-conjugate property of Majorana fermions-they are their own antiparticles. In iron-based superconductors, zero-energy states in vortices have been reported as potential Majorana bound states, but the evidence remains controversial. Here, we use scanning tunneling noise spectroscopy to study the tunneling process into vortex bound states in the conventional superconductor NbSe2, and in the putative Majorana platform FeTe0.55Se0.45. We find that tunneling into vortex bound states in both cases exhibits charge transfer of a single electron charge. Our data for the zero-energy bound states in FeTe0.55Se0.45 exclude the possibility of Yu-Shiba-Rusinov states and are consistent with both Majorana bound states and trivial vortex bound states. Our results open an avenue for investigating the exotic states in vortex cores and for future Majorana devices, although further theoretical investigations involving charge dynamics and superconducting tips are necessary.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Reino Unido