2011/04/07 by Yuto Ito, Youhei Yamaji, Masatoshi Imada · 13 citations
Materials Science · Physics and Astronomy · #Chemical and Physical Properties of Materials #Quantum and electron transport phenomena #Superconductivity #Surface (topology) #Surface states #Symmetry (geometry) #Topological Materials and Phenomena #Topological insulator #Topology (electrical circuits) #cond-mat.supr-con
paper · pdf · doi:10.1143/jpsj.80.063704
published in Journal of the Physical Society of Japan 80(6), 063704 (Physical Society of Japan)
arxiv created 2011/04/07 · openalex publication_date 2011/06/03 · arxiv updated 2011/11/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Superconductivity on the surface of topological insulators is known to be anisotropic and unconventional in that the symmetry is the mixture of s-wave and nodeless p-wave component. In contrast to Anderson's theorem for the insensitivity of the s-wave superconducting critical temperature to the nonmagnetic (time-reversal symmetric (TRS)) impurities, anisotropic superconductors including nodeless p-wave one are in general fragile even with small concentration of the TRS impurities. By employing the Abrikosov-Gor'kov theory, we clarify that this type of unconventional superconductivity emergent on the surface state of the strong topological insulators robustly survive against TRS impurities.