Fluctuating pancake vortices revealed by dissipation of Josephson vortex lattice
BUZDIN, Alexandre I.
Institut universitaire de France [IUF]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
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Institut universitaire de France [IUF]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
BUZDIN, Alexandre I.
Institut universitaire de France [IUF]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
< Reduce
Institut universitaire de France [IUF]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Language
en
Article de revue
This item was published in
Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2011-06-27, vol. 83, n° 22, p. 224515 (1-11)
American Physical Society
English Abstract
In strongly anisotropic layered superconductors in tilted magnetic fields the Josephson vortex lattice coexists with the lattice of pancake vortices. Due to the interaction between them, the dissipation of the Josephson-vortex ...Read more >
In strongly anisotropic layered superconductors in tilted magnetic fields the Josephson vortex lattice coexists with the lattice of pancake vortices. Due to the interaction between them, the dissipation of the Josephson-vortex lattice occurs to be very sensitive to the presence of the pancake vortices. If the c-axis magnetic field is smaller then the corresponding lower critical field, the pancake stacks are not formed but the individual pancakes may exist in the fluctuational regime either near surface in large-size samples or in the central region for small-size mesas. We calculate the contribution of such fluctuating pancake vortices to the c-axis conductivity of the Josephson vortex lattice and compare the theoretical results with measurements on small mesas fabricated out of Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ crystals. A fingerprint of fluctuating pancakes is characteristic exponential dependence of the c-axis conductivity observed experimentally. Our results provide strong evidence of the existence of the fluctuating pancakes and their influence on the Josephson-vortex-lattice dissipation.Read less <
Origin
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