Evidence for two-dimensional Ising superconductivity in gated MoS2

被引:736
作者
Lu, J. M. [1 ]
Zheliuk, O. [1 ]
Leermakers, I. [2 ,3 ]
Yuan, N. F. Q. [4 ]
Zeitler, U. [2 ,3 ]
Law, K. T. [4 ]
Ye, J. T. [1 ]
机构
[1] Univ Groningen, Zernike Inst Adv Mat, Device Phys Complex Mat, NL-9747 AG Groningen, Netherlands
[2] Radboud Univ Nijmegen, HFML, EMFL, NL-6525 ED Nijmegen, Netherlands
[3] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 ED Nijmegen, Netherlands
[4] Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China
基金
欧洲研究理事会;
关键词
UPPER CRITICAL-FIELD; PARAMAGNETIC LIMIT; TRANSITIONS; BEHAVIOR;
D O I
10.1126/science.aab2277
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The Zeeman effect, which is usually detrimental to superconductivity, can be strongly protective when an effective Zeeman field from intrinsic spin-orbit coupling locks the spins of Cooper pairs in a direction orthogonal to an external magnetic field. We performed magnetotransport experiments with ionic-gated molybdenum disulfide transistors, in which gating prepared individual superconducting states with different carrier dopings, and measured an in-plane critical field B-c2 far beyond the Pauli paramagnetic limit, consistent with Zeeman-protected superconductivity. The gating-enhanced B-c2 is more than an order of magnitude larger than it is in the bulk superconducting phases, where the effective Zeeman field is weakened by interlayer coupling. Our study provides experimental evidence of an Ising superconductor, in which spins of the pairing electrons are strongly pinned by an effective Zeeman field.
引用
收藏
页码:1353 / 1357
页数:5
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