Flux confinement in mesoscopic superconductors

✍ Scribed by Y. Bruynseraede; V.V. Moshchalkov

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 200 KB
• Volume: 25
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1999.0714

✦ Synopsis

We report on flux confinement effects in superconducting submicron line, loop and dot structures. The main idea of our study was to vary the boundary conditions for confinement of the superconducting condensate by taking samples of different topology and, through that, modifying the lowest Landau level E LLL (H ). Since the critical temperature versus applied magnetic field T c (H ) is, in fact, E LLL (H ) measured in temperature units, it is varied as well when the sample topology is changed. We demonstrate that in all the submicron structures studied the shape of the T c (H ) phase boundary is determined by the confinement topology in a unique way.