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Investigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopy.
Kiphart, D; Harkavyi, Y; Balin, K; Szade, J; Mróz, B; Kuswik, P; Jurga, S; Wiesner, M.
Afiliación
  • Kiphart D; Adam Mickiewicz University, Faculty of Physics, Uniwersytetu Poznanskiego 2, 61-614, Poznan, Poland.
  • Harkavyi Y; Adam Mickiewicz University, Faculty of Physics, Uniwersytetu Poznanskiego 2, 61-614, Poznan, Poland.
  • Balin K; A. Chelkowski Institute of Physics and Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500, Chorzow, Poland.
  • Szade J; A. Chelkowski Institute of Physics and Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500, Chorzow, Poland.
  • Mróz B; Adam Mickiewicz University, Faculty of Physics, Uniwersytetu Poznanskiego 2, 61-614, Poznan, Poland.
  • Kuswik P; Institute of Molecular Physics, Polish Academy of Sciences, ul. Smoluchowskiego 17, 60-179, Poznan, Poland.
  • Jurga S; The NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614, Poznan, Poland.
  • Wiesner M; Adam Mickiewicz University, Faculty of Physics, Uniwersytetu Poznanskiego 2, 61-614, Poznan, Poland. mwiesner@amu.edu.pl.
Sci Rep ; 11(1): 22980, 2021 Nov 26.
Article en En | MEDLINE | ID: mdl-34837028
We used the topological insulator (TI) Bi2Te3 and a high-temperature superconductor (HTSC) hybrid device for investigations of proximity-induced superconductivity (PS) in the TI. Application of the superconductor YBa2Cu3O7-δ (YBCO) enabled us to access higher temperature and energy scales for this phenomenon. The HTSC in the hybrid device exhibits emergence of a pseudogap state for T > Tc that converts into a superconducting state with a reduced gap for T < Tc. The conversion process has been reflected in Raman spectra collected from the TI. Complementary charge transport experiments revealed emergence of the proximity-induced superconducting gap in the TI and the reduced superconducting gap in the HTSC, but no signature of the pseudogap. This allowed us to conclude that Raman spectroscopy reveals formation of the pseudogap state but cannot distinguish the proximity-induced superconducting state in the TI from the superconducting state in the HTSC characterised by the reduced gap. Results of our experiments have shown that Raman spectroscopy is a complementary technique to classic charge transport experiments and is a powerful tool for investigation of the proximity-induced superconductivity in the Bi2Te3.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Rep Año: 2021 Tipo del documento: Article País de afiliación: Polonia Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Rep Año: 2021 Tipo del documento: Article País de afiliación: Polonia Pais de publicación: Reino Unido