Ratchetlike Dynamics of Fluxons in Annular Josephson Junctions Driven by Biharmonic Microwave Fields
A. V. UstinovPhysikalisches Institut III, Universität Erlangen-Nürnberg, D-91058 Erlangen, GermanyC. CoquiPhysikalisches Institut III, Universität Erlangen-Nürnberg, D-91058 Erlangen, GermanyA. KempPhysikalisches Institut III, Universität Erlangen-Nürnberg, D-91058 Erlangen, GermanyYaroslav ZolotaryukBogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Kiev 03143, UkraineMario SalernoDipartamento di Fisica “E. R. Caianiello” and Istituto Nazionale di Fisica della Materia (INFM), Universitá di Salerno, I-84081 Baronissi, Salerno, Italy
2004en
ABI
Annotatsiya
Experimental observation of the unidirectional motion of a topological soliton driven by a biharmonic ac force of zero mean is reported. The observation is made by measuring the current-voltage characteristics for a fluxon trapped in an annular Josephson junction that was placed into a microwave field. The dependence of the fluxon mean velocity at zero dc bias versus the phase shift between the first and second harmonic of the driving force is in qualitative agreement with theoretical expectations.
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