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Updated: May 9, 2026
06:53
Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
Static and dynamic phases for magnetic vortex matter with attractive and repulsive interactions
J A Drocco1, C J Olson Reichhardt, C Reichhardt
1Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
Summary
Exotic vortex states in superconductors exhibit unique behaviors. Simulations reveal that pinning and applied drives can induce pattern formation and dynamical dewetting, with a double peak in differential resistance indicating these interactions.
Area of Science:
- Condensed Matter Physics
- Superconductivity
- Materials Science
Background:
- Exotic vortex states with competing interactions are proposed in superconducting hybrid structures.
- Previous work identified clump or phase-separated states, but behavior under pinning and drive was unknown.
Purpose of the Study:
- To investigate the static and dynamic properties of exotic vortex states under pinning and applied drive.
- To understand pattern formation and phase transitions in these systems.
Main Methods:
- Large-scale simulations were employed to study vortex states.
- Analysis included static properties, dynamic behavior, and interaction with random and periodic pinning.
Main Results:
- In the absence of pinning, complete phase separation occurs.
- Pinning induces a transition from inhomogeneous to homogeneous vortex configurations (wetting phenomenon).
- Applied drive leads to dynamical dewetting into pattern-forming states like moving stripes or labyrinth phases.
Conclusions:
- A robust double peak in differential resistance curves serves as a signature of exotic vortex interactions.
- Results aid in identifying these interactions and address competing interactions in pinned systems.
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