Hall Noise and Transverse Freezing in Driven Vortex Lattices

ALEJANDRO B. KOLTON, DANIEL DOMÍNGUEZ, AND NIELS GRØNBECH-JENSEN

PHYSICAL REVIEW LETTERS

The American Physical Society

Lugar: USA; Año: 1999 vol. 83 p. 3061 - 3064

0031-9007

We study driven vortex lattices in superconducting thin films. Above the critical force Fc we find two dynamical phase transitions at Fp and Ft, which could be observed in simultaneous noise measurements of the longitudinal and Hall voltage. At Fp there is a transition from plastic flow to smectic flow, where the voltage noise is isotropic (Hall noise  =   longitudinal noise) and there is a peak in the differential resistance. At Ft there is a sharp transition to a frozen transverse solid, where the Hall noise falls abruptly and vortex motion is localized in the transverse direction.