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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Autores principales:	D. Kiphart, Y. Harkavyi, K. Balin, J. Szade, B. Mróz, P. Kuświk, S. Jurga, M. Wiesner
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9e84ae18eaf043ab8fb8cf1957fa84c0
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spelling	oai:doaj.org-article:9e84ae18eaf043ab8fb8cf1957fa84c02021-11-28T12:17:00ZInvestigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopy10.1038/s41598-021-02475-w2045-2322https://doaj.org/article/9e84ae18eaf043ab8fb8cf1957fa84c02021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02475-whttps://doaj.org/toc/2045-2322Abstract 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.D. KiphartY. HarkavyiK. BalinJ. SzadeB. MrózP. KuświkS. JurgaM. WiesnerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q 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
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.
format	article
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
title	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_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_sort	investigations of proximity-induced superconductivity in the topological insulator bi2te3 by microraman spectroscopy
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9e84ae18eaf043ab8fb8cf1957fa84c0
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Investigations of proximity-induced superconductivity in the topological insulator Bi2Te3 by microRaman spectroscopy

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