A vortex solid-to-liquid transition with fully anisotropic scaling

Magnus Andersson (1) , Beatriz Espinosa-Arronte (1) , Cornelis Jacominus van Der Beek (2) , Marios Nikolaou (3) , Jack Lidmar (3) , Mats Wallin (3)

1 KTH - Department of Microelectronics and Applied Physics
2 LSI - Laboratoire des Solides Irradiés - Irradiated Solids Laboratory
3 DEPARTEMENT OF THEORETICAL PHYSICS - Departement of Theoretical Physics

The vortex solid-to-liquid transition has been studied in heavy ion irradiated untwinned single crystals of YBa2Cu3O7− with an inclined applied magnetic field. For magnetic fields tilted at angles about 45 away from the columnar defects, we find that the electric resistivity in the vortex liquid regime approaches zero with power laws in the reduced temperature T − Tc that have different exponents in all three spatial directions. Since the symmetry in the problem has been broken in two non-collinear directions by i) the direction of the columnar defects and ii) the direction of the applied magnetic field, our findings give evidence for a new type of critical behavior with fully anisotropic critical exponents. A possible view of the vortex topology for the transition is also suggested.

Mots clés: Superconductivity; Bose-glass transition; critical scaling; correlation length; vortex glass; universality class; depinning

Domaines: Supraconductivité [cond-mat.supr-con]

Magnus Andersson, Beatriz Espinosa-Arronte, Cornelis Jacominus van Der Beek, Marios Nikolaou, Jack Lidmar, et al.. A vortex solid-to-liquid transition with fully anisotropic scaling. 25th International Conference on Low Temperature Physics LT25, Aug 2008, Amsterdam, Netherlands. pp.052007, ⟨10.1088/1742-6596/150/5/052007⟩. ⟨hal-00288643⟩