周期性基底上的活性物质相称与阻挫效应

二维周期性钉扎基底上驱动探针粒子的主动流变学与反公度效应

Active Rheology and Anti-Commensuration Effects For Driven Probe Particles on Two Dimensional Periodic Pinning Substrates

本研究通过主动流变学模拟，发现驱动探针粒子在二维周期性钉扎基底上于公度状态下出现阻力减小的反公度效应，并绘制了不同流动相区域，该效应在多种基底和粒子系统中具有稳健性。

周期基底调制二维Yukawa固体中的动力学公度效应

Dynamical commensuration effect in a two-dimensional Yukawa solid modulated by periodic substrates

通过Langevin模拟研究二维尘埃等离子体固体在周期基底调制下的横向脱钉动力学，发现临界脱钉力随公度比非单调变化，其极值对应动力学公度与非公度条件，归因于晶格结构稳定性。

Single-file mobility of water-like fluid in a generalized Frenkel-Kontorova model

In this work we used a generalized Frenkel-Kontorova model to study the mobility of water molecules inside carbon nanotubes with small radius at low temperatures. Our simulations show that the mobility of the confined water decreases monotonically increasing the amplitude of the substrate potential at fixed commensurations. On the other hand, the mobility of the water molecules shows a non-monotonic behavior when varying the commensuration. This result indicates that the mobility of the confined fluid presents different behavior regimes depending on the amplitude of the water-nanotube interact…

Liquid-crystal patterns of rectangular particles in a square nanocavity

Using density-functional theory in the restricted-orientation approximation, we analyse the liquid-crystal patterns and phase behaviour of a fluid of hard rectangular particles confined in a two-dimensional square nanocavity of side length $H$ composed of hard inner walls. Patterning in the cavity is governed by surface-induced order, capillary and frustration effects, and depends on the relative values of particle aspect ratio $κ\equiv L/σ$, with $L$ the length and $σ$ the width of the rectangles ($L\geσ$), and cavity size $H$. Ordering may be very different from bulk ($H\to\infty$) behaviour…

Structural Transitions and Dynamical Regimes for Directional Locking of Particles Driven over Periodic Substrates

We numerically investigate collective ordering and disordering effects for vortices in type-II superconductors interacting with square and triangular substrate arrays under a dc drive that is slowly rotated with respect to the fixed substrate. A series of directional locking transitions occur when the particle motion locks to symmetry directions of the substrate, producing a series of steps in the velocity-force curves. The locking transitions coincide with structural transitions between triangular, square, smectic, or disordered particle arrangements, which can be identified using the structu…

有序基底上活性物质未来研究方向

Future Directions for Active Matter on Ordered Substrates

本文综述并展望了活性物质粒子与周期性基底耦合系统中的新型公度效应、定向锁定及活性相，并提出包括活性孤子、活性莫特相和活性人工自旋冰等未来研究方向。