INVESTIGADORES
KOLTON alejandro Benedykt
artículos
Título:
Pinning induced fluctuations on driven vortices
Autor/es:
ALEJANDRO B. KOLTON
Revista:
PHYSICA C - SUPERCONDUTIVITY
Editorial:
Elsevier
Referencias:
Año: 2006 vol. 437 p. 153 - 156
ISSN:
0921-4534
Resumen:
We use a simple model to study the long time fluctuations induced by
random pinning on the motion of driven non-interacting vortices. We
find that vortex motion seen from the co-moving frame is diffusive and
anisotropic, with velocity dependent diffusion constants. Longitudinal
and transverse diffusion constants cross at a characteristic velocity
where diffusion is isotropic. The diffusion front is elongated in the
direction of the drive at low velocities and elongated in the
transverse direction at large velocities. We find that the mobility in
the driven direction is always larger than the transverse mobility, and
becomes isotropic only in the large velocity limit.