High-pressure synthesis of superconducting Sn$_{3}$S$_{4}$ using diamond anvil cell with boron-doped diamond heater

TL;DR

This study demonstrates the high-pressure synthesis of superconducting Sn$_{3}$S$_{4}$ using a diamond anvil cell with a boron-doped diamond heater, revealing its stability, metallicity, and superconductivity with a transition temperature of 13.3 K.

Contribution

It introduces a novel high-pressure synthesis method for Sn$_{3}$S$_{4}$ superconductors using a specialized diamond anvil cell with integrated transport measurement capabilities.

Findings

Sn$_{3}$S$_{4}$ is stable above 5 GPa during decompression.

Superconductivity with T$_{c}$ up to 13.3 K was observed.

Pressure-T$_{c}$ relationship matches first-principles calculations.

Abstract

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 Sn$_{3}$S$_{4}$ superconductor. X-ray diffraction and Raman spectroscopy reveal that the Sn$_{3}$S$_{4}$ phase is stable in the pressure range of P>5 GPa in a decompression process. Transport measurement terminals in the diamond anvil cell detect a metallic nature and superconductivity in the synthesized Sn$_{3}$S$_{4}$ with a maximum onset transition temperature of 13.3 K at 5.6 GPa. The observed pressure-T$_{c}$ relationship is consistent with that from the first-principles calculation. The observation of superconductivity in Sn$_{3}$S$_{4}$ opens further materials exploration under high temperature and pressure conditions.