High-Pressure Synthesis of Superconducting SnS Using a Diamond Anvil Cell with a Boron-Doped Diamond Heater.

High-pressure techniques open exploration of functional materials in broad research fields. An established diamond anvil cell with a boron-doped diamond heater and transport measurement terminals has performed the high-pressure synthesis of a cubic SnS superconductor. X-ray diffraction and Raman spectroscopy reveal that the SnS phase is stable in the pressure range of > 5 GPa in a decompression process. Transport measurement terminals in the diamond anvil cell detect a metallic nature and superconductivity in the synthesized SnS with a maximum onset transition temperature () of 13.3 K at 5.6 GPa. The observed pressure- relationship is consistent with that from the first-principles calculation. The observation of superconductivity in SnS opens further materials exploration under high-temperature and -pressure conditions.