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Fully anisotropic superconducting transition in ion-irradiated YBa2Cu3O7-d with a tilted magnetic field

B. Espinosa-Arronte·M. Andersson·C. J. van der Beek·M. Nikolaou·J. Lidmar·M. Wallin
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Abstract

We consider the superconducting vortex solid-to-liquid transition in heavy ion-irradiated untwinned YBa2Cu3O7-d single crystals in the case where the magnetic field direction does not coincide with that of the irradiation-induced linear columnar defects. For a certain range of angles, the resistivities measured in three orthogonal spatial directions vanish at the transition as three clearly different powers of reduced temperature. At previously known second-order phase transitions, scaling of physical quantities has either been isotropic or anisotropic in one direction. Thus, our findings yield evidence for a new type of critical behavior with fully anisotropic critical exponents.

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B. Espinosa-Arronte, M. Andersson, C. J. van der Beek, M. Nikolaou, J. Lidmar, M. Wallin. 2007-03-08. Fully anisotropic superconducting transition in ion-irradiated YBa2Cu3O7-d with a tilted magnetic field. https://arxiv.org/abs/cond-mat/0703218

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