New magnetic-field-induced macroscopic quantum phenomenon in a superconductor with gap nodes
| dc.creator | Varelogiannis, Georgios | |
| dc.creator | Heritier, Michel | |
| dc.date | 2002-10-01 | |
| dc.date.accessioned | 2026-07-07T02:47:32Z | |
| dc.date.available | 2026-07-07T02:47:32Z | |
| dc.description | High-$T_c$ superconductivity is unconventional because the gap is not isotropic as in simple metals but has $d_{x^2-y^2}$ symmetry with lines of nodes. In a fascinating thermal transport experiment on a high-$T_c$ superconductor, Krishana et al \cite{Krishana} have reported mysterious magnetic field induced first order transitions from a superconducting state with gap nodes to a state without gap nodes. We show here that this is an experimental manifestation of a novel {\it macroscopic} quantum phenomenon induced by the magnetic field, qualitatively different from the usual quantum Hall effects. It corresponds to the {\it quantization of the superfluid density} in a superconductor with gap nodes due to the generation of Confined Field Induced Density Waves (CFIDW) in the node regions of the Fermi surface. The Landau numbers $L$ are not sufficient to index these macroscopic quantum states and the addition of a new quantum number $ζ$ is necessary. Distinct qualitative implications of this non-integer $|L,ζ>$ quantization are also evident in a number of recent unexplained experimental reports in the cuprates. | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0210031 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0210031 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/20047 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | New magnetic-field-induced macroscopic quantum phenomenon in a superconductor with gap nodes | |
| dc.type | text |