Investigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopy
Abstract 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 f...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2021-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-021-02475-w |
| _version_ | 1818982361069518848 |
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| author | D. Kiphart Y. Harkavyi K. Balin J. Szade B. Mróz P. Kuświk S. Jurga M. Wiesner |
| author_facet | D. Kiphart Y. Harkavyi K. Balin J. Szade B. Mróz P. Kuświk S. Jurga M. Wiesner |
| author_sort | D. Kiphart |
| collection | DOAJ |
| description | Abstract 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. |
| first_indexed | 2024-12-20T17:45:59Z |
| format | Article |
| id | doaj.art-9e84ae18eaf043ab8fb8cf1957fa84c0 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-20T17:45:59Z |
| publishDate | 2021-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-9e84ae18eaf043ab8fb8cf1957fa84c02022-12-21T19:30:59ZengNature PortfolioScientific Reports2045-23222021-11-011111910.1038/s41598-021-02475-wInvestigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopyD. Kiphart0Y. Harkavyi1K. Balin2J. Szade3B. Mróz4P. Kuświk5S. Jurga6M. Wiesner7Adam Mickiewicz University, Faculty of PhysicsAdam Mickiewicz University, Faculty of PhysicsA. Chełkowski Institute of Physics and Silesian Center for Education and Interdisciplinary Research, University of SilesiaA. Chełkowski Institute of Physics and Silesian Center for Education and Interdisciplinary Research, University of SilesiaAdam Mickiewicz University, Faculty of PhysicsInstitute of Molecular Physics, Polish Academy of SciencesThe NanoBioMedical Centre, Adam Mickiewicz UniversityAdam Mickiewicz University, Faculty of PhysicsAbstract 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.https://doi.org/10.1038/s41598-021-02475-w |
| spellingShingle | D. Kiphart Y. Harkavyi K. Balin J. Szade B. Mróz P. Kuświk S. Jurga M. Wiesner Investigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopy Scientific Reports |
| title | Investigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopy |
| title_full | Investigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopy |
| title_fullStr | Investigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopy |
| title_full_unstemmed | Investigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopy |
| title_short | Investigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopy |
| title_sort | investigations of proximity induced superconductivity in the topological insulator bi2te3 by microraman spectroscopy |
| url | https://doi.org/10.1038/s41598-021-02475-w |
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