Magnetic field orientation dependence of planar tunneling spectroscopy in the superconducting state of NbSe2

被引：0

作者：

Yu Ji

Zehao Dong

Hao Wang

Qingyang Li

Shusen Ye

Zhiting Gao

Zhenqi Hao

Yayu Wang

机构：

[1] State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing

[2] Beijing Innovation Center for Future Chips, Tsinghua University, Beijing

[3] Frontier Science Center for Quantum Information, Beijing

[4] Hefei National Laboratory, Hefei

来源：

Quantum Frontiers | / 2卷 / 1期

关键词：

Density of state; Doppler shift; Planar tunnel junction; Type-II superconductor;

D O I：

10.1007/s44214-023-00031-3

中图分类号：

学科分类号：

摘要：

Layered superconductors exhibit strong anisotropic responses to magnetic fields in out-of-plane and in-plane orientations, due to their distinct vortex structures and upper critical field values. Here, we utilize the planar tunnel junction technique to perform continuous magnetic field-dependent dI/dV spectroscopy measurements on 2H-NbSe2 under different field orientations. We observe characteristic kink features for weak in-plane magnetic fields, but the overall behaviors are quite similar for different field orientations despite the distinct vortex generation processes and widely different upper critical field values. Especially, the generic square root dependence of the Fermi level density of state on magnetic field indicates that the Doppler shift plays a central role in the low energy excitations of 2H-NbSe2 in the presence of magnetic field. © The Author(s) 2023.

引用

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