The voltage-current characteristics of superconductors under magnetic field

被引：1

作者：

Hue Thi Minh Dang ^{[1
]}

Bui Duc Tinh ^{[2
]}

机构：

[1] Thuyloi Univ, Fac Elect & Elect Engn, Div Phys, 175 Tay Son, Hanoi, Vietnam

[2] Hanoi Natl Univ Educ, Fac Phys, 136 Xuan Thuy, Hanoi, Vietnam

来源：

EUROPEAN PHYSICAL JOURNAL B | 2022年 / 95卷 / 03期

关键词：

COVARIANT GAUSSIAN APPROXIMATION; VORTEX-GLASS SUPERCONDUCTIVITY; TRANSPORT-PROPERTIES; II SUPERCONDUCTORS; FLUCTUATIONS; DEPOSITION; PHASE; TUNGSTEN; FILM;

D O I：

10.1140/epjb/s10051-022-00300-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A nonlinear theory of the electronic transport in superconductors under magnetic field in the framework of the three-dimensional Ginzburg-Landau model with thermal fluctuation is investigated. We assume that the thermal fluctuations are strong enough to melt the Abrikosov vortex lattice created by the magnetic field into a moving vortex liquid. On one hand, vortex crystal is effectively destroyed by thermal fluctuations and, on the other hand, disorder (significantly "weakened" by thermal fluctuations) is not strong enough to significantly affect the transport. We use self-consistent Gaussian approximation to treat the nonlinear interaction term in dynamics and include all Landau levels to treat arbitrary magnetic fields. The voltage-current curve is calculated for arbitrary magnetic field and temperature. Our results are compared to experimental data on tungsten (W) strip. The comparison is good for temperature above T-g, where vortex liquid phase occurs. We find that the voltage-current dependence acquires an S-shape form leading to switching instabilities for temperature below T-g.

引用

页数：6

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