Thermodynamics of the vortex liquid in heavy ion-irradiated superconductors
| dc.creator | van der Beek, Cornelis J. | |
| dc.creator | Konczykowski, Marcin | |
| dc.creator | Fruchter, Luc | |
| dc.creator | Brusetti, René | |
| dc.creator | Klein, Thierry | |
| dc.creator | Marcus, Jacques | |
| dc.creator | Marcenat, Christophe | |
| dc.date | 2005-04-05 | |
| dc.date | 2005-09-23 | |
| dc.date.accessioned | 2026-07-07T08:54:39Z | |
| dc.date.available | 2026-07-07T08:54:39Z | |
| dc.description | It is shown that the large effect of heavy ion-irradiation on the thermodynamical properties of the anisotropic superconductor YBa$_{2}$Cu$_{3}$O$_{7-δ}$ extends well into the superconducting fluctuation regime. The presence of the induced amorphous columnar defects shifts the specific heat maximum at the normal-to-superconducting transition. This effect is similar to that recently put into evidence in cubic K$_{x}$Ba$_{1-x}$BiO$_{3}$ ($x \simeq 0.35$). In both compounds, vortex pinning manifests itself as a sharp angular dependence of the \em equilibrium \rm torque. In YBa$_{2}$Cu$_{3}$O$_{7-δ}$, pinning by the defects appears at the temperature $T_{C_{p}}^{max}$ of the specific heat maximum, well above the magnetic irreversibility line $T_{irr}(H)$. In isotropic K$_{x}$Ba$_{1-x}$BiO$_{3}$, the onset of the pinning-related torque anomaly tracks the onset of the specific heat anomaly and the irreversibility line. In YBa$_{2}$Cu$_{3}$O$_{7-δ}$, fluctuations of the amplitude of the order parameter (and not vortex line wandering) are ultimately responsible for the vanishing of pinning. In K$_{x}$Ba$_{1-x}$BiO$_{3}$, vortex pinning disappears only at the superconducting-to-normal transition. The results indicate that in both compounds, the pinning energy at the ``Bose glass'' transition is large with respect to the total free energy gain in the superconducting state. By implication, the mechanism of this latter transition should be reconsidered. | |
| dc.description | 9 pages, 9 figures, resubmitted to PRB 23-09-2005 | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0504100 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0504100 | |
| dc.identifier | Phys. Rev. B 72, 214504 (2005) | |
| dc.identifier | doi:10.1103/PhysRevB.72.214504 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/146015 | |
| dc.subject | Superconductivity | |
| dc.title | Thermodynamics of the vortex liquid in heavy ion-irradiated superconductors | |
| dc.type | text |