期刊
PHYSICAL REVIEW B
卷 90, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.094520
关键词
-
资金
- National Key Basic Research Program of China [2014CB648400]
- National Natural Science Foundation of China [11474080, 11104051, 11104053]
- Distinguished Young Scientist Funds of Zhejiang Province [LR14A040001]
By systematic chemical substitution of Pt and Ni in the newly discovered superconductor Nb2PdS5 (T-c similar to 6 K), we study the evolution of its superconducting properties with doping, focusing on the behavior of the upper critical field H-c2. In contrast to the previous results of Se doping on S sites, superconductivity is found to be rather robust against the Pt and Ni dopants on the one-dimensional Pd chains. Most strikingly, the reduced Hc(2), i.e., the ratio of H-c2/T-c, is seen to be significantly enhanced by the heavier Pt doping but suppressed in the Ni-doped counterparts, distinct from the nearly constant value in the Se-doped samples. Our findings therefore suggest that the upper critical field of this system can be modified in a tunable fashion by chemical doping on the Pd chains with elements of varying mass numbers. The spin-orbit coupling on the Pd sites, by inference, should play an important role in the observed superconductivity and on the large upper critical field beyond the Pauli pair-breaking field.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据