2020/06/17 by Ritesh Kumar, Kumar, Ritesh, Shekhar Das +16
Earth and Planetary Sciences · Physics and Astronomy · #FOS: Physical sciences #High-pressure geophysics and materials #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Topological Materials and Phenomena #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.2006.10098
9 pages, 4 figure
arxiv created 2020/06/17 · openalex publication_date 2020/06/17 · arxiv updated 2020/06/19 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
The superconducting systems emerging from topological insulators upon metal ion intercalation or application of high pressure are ideal for investigation of possible topological superconductivity. In this context, Sr-intercalated Bi2Se3 is specially interesting because it displays pressure induced re-entrant superconductivity where the high pressure phase shows almost two times higher Tc than the ambient superconducting phase ( TC∼ 2.9 K). Interestingly, unlike the ambient phase, the pressure-induced superconducting phase shows strong indication of unconventional superconductivity. However, since the pressure-induced phase remains inaccessible to spectroscopic techniques, the detailed study of the phase remained an unattained goal. Here we show that the high-pressure phase can be realized under a mesoscopic point contact, where transport spectroscopy can be used to probe the spectroscopic properties of the pressure-induced phase. We find that the point contact junctions on the high-pressure phase show unusual response to magnetic field supporting the possibility of unconventional superconductivity.