Dynamical Phase Transition in a Fully Frustrated Square Josephson Array

TL;DR

This paper investigates dynamical phase transitions in a fully frustrated square Josephson array at zero temperature, identifying three distinct phases with unique voltage behaviors under applied current.

Contribution

It reveals the existence of three dynamical phases and characterizes their voltage responses, including a phase with a finite transverse critical current, in a fully frustrated Josephson array.

Findings

Identified three dynamical phases: pinned, plastic, and moving lattice.

Observed a finite transverse critical current in the moving lattice phase.

Provided numerical evidence for phase transitions at zero temperature.

Abstract

We study dynamical phase transitions at temperature T = 0 in a fully frustrated square Josephson junction array subject to a driving current density which has nonzero components parallel to both axes of the lattice. Our numerical results show clear evidence for three dynamical phases: a pinned vortex lattice characterized by zero time-averaged voltages, a ``plastic'' phase in which both voltages are nonzero, and a moving lattice phase in which only one of the time-average voltage components is nonzero. The last of these has a finite transverse critical current.