Finance

Physics

Pure mathematics

Phenomenological model

Mathematics

Order (exchange)

Angular momentum

Economics

Condensed matter physics

Quantum electrodynamics

Theoretical physics

Spin (aerodynamics)

Superconductivity

Quantum mechanics

Diode

Field (mathematics)

Momentum (technical analysis)

Thermodynamics

New Journal of Physics

We study theoretically the superconductor diodes, where the magnitude of the critical current changes as the direction is reversed, in terms of a generalized Ginzburg-Landau model with the higher-order terms in the momentum of the order parameter. This theory is applied to Rashba spin-orbit coupled systems, where analytical relations between the nonreciprocal critical currents and the system parameters are achieved. Numerical calculations with mean-field theory are also obtained to study broader parameter regions. These results offer a rather general description and design principles of superconductor diodes.

A phenomenological theory of superconductor diodes