Mechanism for π phase shifts in Little-Parks experiments: Application to 4Hb−TaS2 and to 2H−TaS2 intercalated with chiral molecules

Abstract

Recently, unusual π phase shifts in Little-Parks experiments performed on two systems derived from the layered superconductor 2H−TaS2 were reported. These systems share the common feature that additional layers have been inserted between the 1H−TaS2 layers. In both cases, the π phase shift has been interpreted as evidence for the emergence of exotic superconductivity in the 1H layers. Here, we propose an alternative explanation assuming that superconductivity in the individual 1H layers is of conventional s-wave nature derived from th Show more