2022/02/18 by Shao-Pin Chiu, Vivek Mishra, Chiu, Shao-Pin +11
Physics and Astronomy · #FOS: Physical sciences #Semiconductor materials and interfaces #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys #Surface and Thin Film Phenomena #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.2202.08989
6+3 pages, 9 figures
arxiv created 2022/02/18 · openalex publication_date 2022/02/18 · arxiv updated 2022/02/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report enhanced two-component superconductivity in (CoSi2/Si)/TiSi2 superconductor/normal-metal (S/N) heterojunctions. An enhanced superconducting transition temperature about twice that of CoSi2 and an upper critical field about 20 times bigger than that of epitaxial CoSi2/Si films were found. The tunneling spectra of three-terminal S/N junctions show pronounced zero-bias conductance peaks (ZBCPs) that signify penetration of odd-frequency, spin-triplet and even-parity Cooper pairs in TiSi2 from triplet dominant pairing in CoSi2/Si driven by symmetry reduction at the CoSi2/Si interface. Both the enhancement of the superconducting transition temperature and the ZBCPs are found to be more pronounced if TiSi2 is made more diffusive.