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Related Experiment Video

Updated: Jul 25, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Dynamic phases and the peak effect in dirty type II superconductors

van Otterlo A¹, Scalettar, Zimanyi

¹Physics Department, University of California, Davis, California 95616, USA.

Physical Review Letters

|October 6, 2000

Summary

We investigated driven vortex matter dynamics. Critical current peaks were observed during transitions and melting, consistent with simulations and YBCO crystal experiments, revealing a "moving solid" phase at higher drives.

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Area of Science:

Condensed matter physics
Superconductivity
Vortex dynamics

Background:

Driven vortex matter exhibits complex phase transitions.
Understanding critical current behavior is crucial for superconducting applications.

Purpose of the Study:

To numerically and experimentally investigate the dynamics of driven vortex matter.
To characterize the critical current behavior across phase transitions.
To explore the influence of disorder on vortex matter at higher drives.

Main Methods:

London-Langevin simulations.
Transport measurements on untwinned YBCO crystals.

Main Results:

Critical current shows a peak across the Bragg glass to vortex glass transition and melting line.
Observed peak is associated with a crossing of current-voltage (I-V) curves.
Vortices reorder into a "moving solid" phase at higher drives, with disorder effects modeled by a "shaking temperature" inversely proportional to velocity.

Conclusions:

The study provides a comprehensive understanding of driven vortex matter dynamics.
Experimental results align with numerical simulations, validating the findings.
Disorder plays a significant role in the emergent "moving solid" phase.