Superconductivity and Fermi Surface Anisotropy in Transition Metal Dichalcogenide NbTe2

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2019,（5）
• 页码范围: 80-85
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/0256-307X/36/5/057402

摘要

Transition metal dichalcogenides,featuring layered structures,have aroused enormous interest as a platform for novel physical phenomena and a wide range of potential applications.Among them,special interest has been placed upon WTe2 and MoTe2,which exhibit non-trivial topology both in single layer and bulk as well as pressure induced or enhanced superconductivity.We study another distorted 1T material NbTe2 through systematic electrical transport measurements.Intrinsic superconductivity with onset transition temperature (Tconset) up to 0.72K is detected where the upper critical field (Hc) shows unconventional quasi-linear behavior,indicating spin-orbit coupling induced p-wave paring.Furthermore,a general model is proposed to fit the angledependent magnetoresistance,which reveals the Fermi surface anisotropy of Nb Te2.Finally,non-saturating linear magnetoresistance up to 50 T is observed and attributed to the quantum limit transport.