Substrate Charge Transfer Induced Ferromagnetism in MnSe/SrTiO Ultrathin Films.

The observation of superconductivity in MnSe at 12 GPa motivated us to investigate whether superconductivity could be induced in MnSe at ambient conditions. A strain-induced structural change in the ultrathin film could be one route to the emergence of superconductivity. In this report, we present the physical property of MnSe ultrathin films, which become tetragonal (stretched -plane and shortened -axis) on a (001) SrTiO (STO) substrate, prepared by the pulsed laser deposition (PLD) method.