Abstract
The depinned vortex lattice in a type II superconductor represents a periodic structure moving in a random distribution of pinning centers. Such a system displays a washboard frequency given by /2=v/a where v is the velocity and a the lattice period. By mixing a dc and an ac current (of frequency ext), we demonstrate the existence of the washboard effect in the vortex state in an untwinned crystal of YBa2Cu3O6.93. Jumps in the dc current-voltage characteristics are observed when and ext are harmonically related. We show that these jumps vanish when the line at the solid-to-liquid transition is crossed.
Original language | English (US) |
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Pages (from-to) | 3684-3687 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 74 |
Issue number | 18 |
DOIs | |
State | Published - 1995 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy