Large Low-Frequency Fluctuations in the Velocity of a Driven Vortex Lattice in a Single Crystal of 2H−NbSe2 Superconductor
Shyam Mohan, Jaivardhan Sinha, S. S. Banerjee, A. K. Sood, S. Ramakrishnan, A. K. Grover
DOI 10.1103/PhysRevLett.103.167001 · Physical Review Letters
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Abstract
The driven state of a well-ordered flux line lattice in a single crystal of 2H−NbSe2 in the time domain has revealed the presence of substantial fluctuations in velocity, with large and distinct time periods (∼seconds). A superposition of a periodic drive in the driven vortex lattice causes distinct changes in these fluctuations. We propose that prior to the onset of the peak effect there exists a heretofore unexplored regime of coherent dynamics, with unexpected behavior in velocity fluctuations.
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