Interplay between topological surface states and superconductivity in SmB6/NbN tunnel junctions

Lin, Zhu
Zhou, Yong
Kong, Ling-Jian
Tang, Dongsheng
Lu, Hai-Zhou
Huang, Shiu-Ming
Zhu, Rui
Xu, Jun
Lin, Fang
Wang, Jianbo
Liao, Zhi-Min
Yu, Dapeng

Open link

Publication date

January 2017

DOI

10.1103/PhysRevB.96.165408

Publisher

PHYSICAL REVIEW B

ISSN

2469-9950

Journal

issn:2469-9950

Abstract

We report the interplay between Cooper pairs in superconductor NbN and topological surface states in SmB6 nanowire through magnetotransport measurements. The NbN electrodes are superconductive below 13.5 K and the SmB6 nanowire shows the surface states dominate transport below 6 K. The tunneling between the topological surface states in SmB6 and the Cooper pairs in NbN gives rise to a transition from positive to negative magnetoresistance between 0 and 14 T.National Key Research and Development Program of China [2016YFA0300802]; NSFC [11774004, 11234001, 11404009]; Guangdong Innovative and Entrepreneurial Research Team Program [2016ZT06D348]; Taiwan National Science Council [MOST 103-2112-M-110-009-MY3, MOST 106-2112-M-110-002]SCI(E)A...