Electron–Electron Interaction and Weak Antilocalization Effect in a Transition Metal Dichalcogenide Superconductor

In disordered transition-metal dichalcogenide (TMD) superconductor, both the strong spin-orbit coupling (SOC) and disorder show remarkable effects on superconductivity. However, features of SOC are rarely detected directly. Herein, quantum transport behaviors arising from interplay in TMD superconductor 1T-NbSeTe reported. Before entering superconducting state, single crystal at low temperature shows a resistivity upturn, which is T 1/2 dependent insensitive to applied magnetic fields. The magnetoresistance (MR) temperatures an H dependence high characteristics good agreement with electron–electron interaction (EEI) conductor. addition, upturn changes MR fields suggest contribution weak antilocalization (WAL) effect material. Moreover, quantitative analyses different samples imply anomalous disorder-enhanced superconductivity that needs be further understood. results reveal EEI SOC-induced WAL 1T-NbSeTe, illustrates minimum widely studied doped superconductors. work also provides insights into