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<p>We present a theoretical framework for charge transport in driven nano-electromechanical shuttles undergoing hard-wall collisions. The interplay between collisions and electric transport leads to a novel synchronization phenomenon in the shuttle dynamics. Our analysis reveals that the oscillation period increases by an integer multiple of the collision-free period, with trajectories transitioning to chaotic regimes under stronger external forces. Furthermore, rectified symmetry-breaking currents are generated when the integer multiplier is even, showing discontinuous behavior as a function of external parameters.</p>

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Spontaneous symmetry breaking of nano-electromechanical shuttle due to collisions

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • SungMin Kim,
  • Sungwan Cho,
  • Seong Uk Yu,
  • Chulki Kim,
  • Hee Chul Park

摘要

We present a theoretical framework for charge transport in driven nano-electromechanical shuttles undergoing hard-wall collisions. The interplay between collisions and electric transport leads to a novel synchronization phenomenon in the shuttle dynamics. Our analysis reveals that the oscillation period increases by an integer multiple of the collision-free period, with trajectories transitioning to chaotic regimes under stronger external forces. Furthermore, rectified symmetry-breaking currents are generated when the integer multiplier is even, showing discontinuous behavior as a function of external parameters.