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25 April 2024 |
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Confinement and Quantization Effects in Mesoscopic Superconducting Structures | | V. V. Moshchalkov
; V. Bruyndoncx
; E. Rosseel
; L. Van Look
; M. Baert
; M. J. Van Bael
; T. Puig
; C. Strunk
; Y. Bruynseraede
; | | Date: |
24 Apr 1998 | | Subject: | Superconductivity; Mesoscopic Systems and Quantum Hall Effect | cond-mat.supr-con cond-mat.mes-hall | | Affiliation: | K U Leuven, Belgium | | Abstract: | We have studied quantization and confinement effects in nanostructured superconductors. Three different types of nanostructured samples were investigated: individual structures (line, loop, dot), 1-dimensional (1D) clusters of loops and 2D clusters of antidots, and finally large lattices of antidots. Hereby, a crossover from individual elementary "plaquettes", via clusters, to huge arrays of these elements, is realized. 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 through nanostructuring. We demonstrate that in all studied nanostructured superconductors the shape of the T_c(H) phase boundary is determined by the confinement topology in a unique way. | | Source: | arXiv, cond-mat/9804267 | | Services: | Forum | Review | PDF | Favorites | |
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