Superconducting properties of pseudobinary telluride Chevrel Phase Mo$_4$Re$_2$Te$_8$

TL;DR

This study investigates the superconducting properties of Mo$_4$Re$_2$Te$_8$, a pseudobinary telluride Chevrel phase, revealing a fully gapped state with signs of unconventional superconductivity near the Pauli limit.

Contribution

It provides detailed experimental insights into the superconducting behavior of Mo$_4$Re$_2$Te$_8$, highlighting its structural and electronic characteristics.

Findings

Superconducting transition temperature T_C = 3.26 K

Fully gapped superconducting state suggested by specific heat

Proximity to Pauli limiting field indicates unconventional superconductivity

Abstract

Unconventional superconductivity in the Chevrel phase offers a wide structural aspect to understand the superconducting ground state. A detailed investigation on the superconducting properties of Re based pseudobinary telluride Chevrel phase Mo$_4$Re$_2$Te$_8$ is reported. It crystallizes in a trigonal structure with the space group $R\bar{3}H$ having superconducting transition temperature at $T_C$ = 3.26(3) K. Specific heat measurements suggests a fully gapped superconducting state; however, the proximity of upper critical field value from the Pauli limiting field can be attributed to unconventional nature.