منابع مشابه
Phases of Josephson junction ladders.
We study a Josephson junction ladder in a magnetic field in the absence of charging effects via a transfer matrix formalism. The eigenvalues of the transfer matrix are found numerically, giving a determination of the different phases of the ladder. The spatial periodicity of the ground state exhibits a devil’s staircase as a function of the magnetic flux filling factor f . If the transverse Jos...
متن کاملScreening in Josephson-junction ladders.
Both critical current and Shapiro steps in Josephson ladders are found to show effects of vortex exclusion below a critical magnetic field. Vortices are excluded even though the flux itself is not screened out. When current is injected perpendicular to the ladder edges, the critical current is unchanged from its f50 value up to a penetration field of f c1''0.12 flux quanta per plaquette. Simila...
متن کاملIncommensurate dynamics of resonant breathers in Josephson junction ladders
We present theoretical and experimental studies of resonant localized resistive states in a Josephson junction ladder. These complex breather states are obtained by tuning the breather frequency into the upper band of linear electromagnetic oscillations of the ladder. Their prominent feature is the appearance of resonant steps in the current–voltage (I –V) characteristics. We have found the res...
متن کاملResonant plasmon scattering by discrete breathers in Josephson junction ladders
A. E. Miroshnichenko,1 M. Schuster,2 S. Flach,3 M. V. Fistul,4 and A. V. Ustinov2 1Nonlinear Physics Centre, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia 2Physikalisches Institut III, Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany 3Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Strasse 38, D-01187 Dres...
متن کاملJosephson junction ladders: Ground state and relaxation phenomena.
This paper considers a Josephson Junction array with the geometry of a ladder and anisotropy in the Josephson couplings. The ground state problem for the ladder corresponds to the one for the one-dimensional chiral XY model in a two-fold anisotropy field, which allows of a rigorous characterization of the ground state phase diagram and the relevant elementary excitations for the system. The app...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1995
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.75.3930