Have fractional shapiro steps been observed in colloidal dynamics?
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Fractional Shapiro steps have been observed in various systems, including colloidal dynamics. In experiments with colloidal monolayers driven across a periodically modulated substrate potential, a Shapiro step structure was observed in the force dependence of the mean particle velocity, indicating dynamical mode locking . Theoretical investigations also predict the occurrence of Shapiro steps in colloidal systems dragged over periodic potentials, with the presence of both ordinary "integer" steps and smaller "subharmonic" steps due to localized solitonic regions . Similarly, in Josephson junction arrays, giant fractional Shapiro steps were observed as evidence of skewed current phase relationships, highlighting the potential for exploring current phase relations in various systems . These findings collectively demonstrate the presence of fractional Shapiro steps in colloidal dynamics and related systems.
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| Fractional Shapiro steps, termed as subharmonic steps, have been theoretically predicted in sliding colloidal monolayers in optical lattices, offering potential experimental accessibility in 2D configurations. | |
| Fractional Shapiro steps, termed as subharmonic steps, have been theoretically predicted in sliding colloidal monolayers in optical lattices due to synchronized slips in incommensurate layers. | |
10 Citations | Not addressed in the paper. |
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