Point-contact enhanced superconductivity in trigonal PtBi2: quest for the origin of 'high- T c'. - Kvitnitskaya, O E; Harnagea, L; Shipunov, G; Aswartham, S; Kovalchuk, I; Fisun, V V; Efremov, D V; Büchner, B; Naidyuk, Yu G (Superconductor Science & Technology, 2026)