Electronic structure of multiquantum giant vortex states in mesoscopic superconducting disks.
We report self-consistent calculations of the microscopic electronic structure of the so-called giant vortex states. These multiquantum vortex states, detected by recent magnetization measurements on submicron disks, are qualitatively different from the Abrikosov vortices in the bulk. We find that, in addition to multiple branches of bound states in the core region, the local tunneling density of states exhibits Tomasch oscillations caused by the single-particle interference arising from quantum confinement. These features should be directly observable by scanning tunneling spectroscopy.
Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439; Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, SK, Canada S7N 5E2; and Department of Physics, University of Notre Dame, Notre Dame, IN 46556-5670.
Kaori
K
Tanaka
István
I
Robel
Boldizsár
B
Jankó