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Author Odintsov, A. A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ JOSEPHSON JUNCTIONS ♦ COOPER PAIRS ♦ PHASE TRANSFORMATIONS ♦ SUPERLATTICES ♦ PHASE DIAGRAMS ♦ QUASI PARTICLES ♦ SIZE EFFECT ♦ WIGNER CRYSTALS
Abstract We investigate uniform one-dimensional arrays of small Josephson junctions [{ital E}{sub {ital J}}{lt}{ital E}{sub {ital C}}, {ital E}{sub {ital C}}=(2{ital e}){sup 2}/2{ital C}] with a realistic Coulomb interaction {ital U}({ital x})={ital E}{sub {ital C}}{lambda}exp({minus}{vert_bar}{ital x}{vert_bar}/{lambda}) (here {lambda}{gt}1 is the screening length in units of the lattice constant of the array). At low energies this system can be described in terms of interacting Bose particles (extra single Cooper pairs) on the lattice. With increasing concentration {nu} of extra Cooper pairs, a crossover from the Bose gas phase to the Wigner crystal phase and then to the superlattice regime occurs. The phase diagram in the superlattice regime consists of commensurable insulating phases with {nu}=1/{ital l} ({ital l} is integer) separated by superconducting regions where the current is carried by excitations with {ital fractional} electric charge {ital q}={plus_minus}2{ital e}/{ital l}. The Josephson current through a ring-shaped array pierced by magnetic flux is calculated for all of the phases. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-07-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 2


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