Probing the order parameter symmetry of two-dimensional superconductors by twisted Josephson interferometry

被引：4

作者：

Xiao, Jiewen ^{[1
]}

Vituri, Yaar ^{[1
]}

Berg, Erez ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW B | 2023年 / 108卷 / 09期

基金：

欧洲研究理事会;

关键词：

TOTAL-ENERGY CALCULATIONS; UNCONVENTIONAL SUPERCONDUCTIVITY; BI2SR2CACU2O8+DELTA;

D O I：

10.1103/PhysRevB.108.094520

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Probing the superconducting order parameter symmetry is a crucial step towards understanding the pairing mechanism in unconventional superconductors. Inspired by the recent discoveries of superconductivity in various van der Waals materials and the availability of the relative twist angle as a continuous tuning knob in these systems, we propose a general setup for probing the order parameter symmetry of two-dimensional superconductors in twisted Josephson junctions. The junction is composed of an anisotropic s-wave superconductor as a probe and another superconductor with an unknown order parameter symmetry. Assuming momentum-resolved tunneling, we investigate signatures of different order parameter symmetries in the twist angle dependence of the critical current, the current-phase relations, and magnetic field dependence. As a concrete example, we study a twisted Josephson junction between NbSe2 and magic angle twisted bilayer graphene.

引用

页数：14