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 YBa₂Cu₃O_7-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 > T_c that converts into a superconducting state with a reduced gap for T < T_c. 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 si

SUBMITTER: Kiphart D 

PROVIDER: S-EPMC8626455 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature