Observation of a possible superconducting gap in silicene on Ag(111) surface

Abstract

A possible superconducting gap, about 35 meV, was observed in silicene on Ag(111) substrate by scanning tunneling spectroscopy. The temperature-dependence measurement reveals a superconductor-metal transition in silicene and gives a critical temperature of 35–40 K. The possible mechanism of superconductivity in silicene is discussed.