Phase transitions in Josephson-junction ladders in a magnetic field
Journal Article
·
· Physical Review, B: Condensed Matter; (USA)
- Department of Physics, Brown University, Providence, RI (USA) Instituto de Pesquisas Espaciais, 12201 Sao Jose dos Campos, Sao Paulo (Brazil)
A model of a Josephson-junction ladder in a perpendicular magnetic field with {ital f}{sub 0}={ital p}/{ital q} flux quanta per plaquette is considered. It is shown that the topological features of the zero-temperature phase diagram, as a function of charging energy and small deviations {ital f}{minus}{ital f}{sub 0} from commensurability of the vortex lattice, are strongly dependent on {ital q}. In addition to a superconductor-insulator transition, a commensurate-incommensurate transition is also possible within the superconducting phase for {ital q}{ge}2. For {ital q}{gt}3, an intermediate incommensurate phase occurs for {ital f}{r arrow}{ital f}{sub 0}.
- OSTI ID:
- 6228767
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:7; ISSN 0163-1829; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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