Vortices in a mesoscopic cone: A superconducting tip in the presence of an applied field
Yajiang Chen, Mauro M. Doria, F. M. Peeters
DOI 10.1103/PhysRevB.77.054511 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
A mesoscopic superconductor in the shape of a circular cone, and size of the order of the coherence length, is investigated theoretically. The external magnetic field is applied perpendicular to its circular basis, and vortex states are obtained in the framework of the Ginzburg-Landau theory. We find patterns made of giant vortex states (GVS), curved multivortex states (MVS), and a combination of both of them. The results are summarized in phase diagrams, where the GVS and MVS regimes are determined according to the applied field and geometric parameters. We find that superconductivity persists up to fields much larger than the upper critical field (Hc2) in case of a very small apex angle. The results are relevant to understand the properties of superconducting tips, which are currently used in scanning tunneling microscopy, in the presence of an external applied field.
Similar papers
Vortices on a superconducting nanoshell: Phase diagram and dynamics
similarity 0.91V. N. Gladilin et al.
Source status unknown — claims are unverified
Variational method to study vortex matter in mesoscopic superconductors
similarity 0.91W. V. Pogosov et al. · 2000 · arXiv:cond-mat/0011134
Source status unknown — claims are unverified
Vortex patterns in a mesoscopic superconducting rod with a magnetic dot
similarity 0.90Mauro M. Doria et al.
Source status unknown — claims are unverified
Current-induced giant vortex and asymmetric vortex confinement in microstructured superconductors
similarity 0.90X. H. Chao et al.
Source status unknown — claims are unverified
Spontaneous vortex state and ferromagnetic behavior of type-II p-wave superconductors
similarity 0.89A. Knigavko & B. Rosenstein
Source status unknown — claims are unverified
Giant vortices in the Ginzburg-Landau description of superconductivity
similarity 0.89Vincent Hakim et al. · 2001 · arXiv:cond-mat/0112413
Source status unknown — claims are unverified