Transition from three- to two-dimensional Ising superconductivity in few-layer NbSe2 by proximity effect from van der Waals heterostacking

被引：12

作者：

Baidya, Prakiran ^{[1
]}

Sahani, Divya ^{[1
]}

Kundu, Hemanta Kumar ^{[2
]}

Kaur, Simrandeep ^{[1
]}

Tiwari, Priya ^{[1
]}

Bagwe, Vivas ^{[3
]}

Jesudasan, John ^{[3
]}

Narayan, Awadhesh ^{[4
]}

Raychaudhuri, Pratap ^{[3
]}

Bid, Aveek ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

[2] Weizmann Inst Sci, IL-7610001 Rehovot, Israel

[3] Tata Inst Fundamental Res, Mumbai 400005, Maharashtra, India

[4] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 17期

关键词：

TOTAL-ENERGY CALCULATIONS; MAJORANA FERMIONS; COULOMB-GAS;

D O I：

10.1103/PhysRevB.104.174510

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the experimental observation of Ising superconductivity in three-dimensional NbSe2 stacked with single-layer MoS2. The angular dependence of the upper critical magnetic field and the temperature dependence of the upper parallel critical field confirm the appearance of two-dimensional Ising superconductivity in threedimensional NbSe2 with a single-layer MoS2 overlay. We show that the superconducting phase has strong Ising spin-orbit correlations which make the holes spin nondegenerate. Our observation of Ising superconductivity in heterostructures of few-layer NbSe2 of thickness -15 nm with single-layer MoS2 raises the interesting prospect of observing topological chiral superconductors with nontrivial Chern numbers in a momentum-space spin-split fermionic system.

引用

页数：8

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