Irreversibility transition of colloidal polycrystals under cyclic deformation

Jana, Pritam Kumar; Alava, Mikko J.; Zapperi, Stefano

doi:10.1038/srep45550

Cited by 14 publications

(11 citation statements)

References 28 publications

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“…We expect that the present work will stimulate further research on RIT, e.g., in the presence of isotropic shear where smectic flow is considered to be absent, and on nonequilibrium phase transitions in various many-particle systems, including colloidal particles 52,53 or dense, jammed systems 28,54–59 .…”

Section: Resultsmentioning

confidence: 94%

Critical behavior near the reversible-irreversible transition in periodically driven vortices under random local shear

Maegochi

Ienaga

Kaneko

et al. 2019

Sci Rep

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When many-particle (vortex) assemblies with disordered distribution are subjected to a periodic shear with a small amplitude , the particles gradually self-organize to avoid next collisions and transform into an organized configuration. We can detect it from the time-dependent voltage (average velocity) that increases towards a steady-state value. For small , the particles settle into a reversible state where all the particles return to their initial position after each shear cycle, while they reach an irreversible state for above a threshold . Here, we investigate the general phenomenon of a reversible-irreversible transition (RIT) using periodically driven vortices in a strip-shaped amorphous film with random pinning that causes local shear, as a function of . By measuring , we observe a critical behavior of RIT, not only on the irreversible side, but also on the reversible side of the transition, which is the first under random local shear. The relaxation time to reach either the reversible or irreversible state shows a power-law divergence at . The critical exponent is determined with higher accuracy and is, within errors, in agreement with the value expected for an absorbing phase transition in the two-dimensional directed-percolation universality class. As is decreased down to the intervortex spacing in the reversible regime, deviates downward from the power-law relation, reflecting the suppression of intervortex collisions. We also suggest the possibility of a narrow smectic-flow regime, which is predicted to intervene between fully reversible and irreversible flow.

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Section: Resultsmentioning

confidence: 94%

Critical behavior near the reversible-irreversible transition in periodically driven vortices under random local shear

Maegochi

Ienaga

Kaneko

et al. 2019

Sci Rep

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“…Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. the colloidal particles, such as granular matter [18][19][20][21], dislocations [22,23], amorphous solids [24][25][26][27], polycrystalline solids [28], charged colloids [29], and vortices in type-II superconductors [30][31][32]. The dynamics of most of these systems is overdamped, and little is known about how nondissipative dynamics would affect a reversible to irreversible transition.…”

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confidence: 99%

Reversible to irreversible transitions in periodically driven skyrmion systems

Brown

Reichhardt

2019

New J. Phys.

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We examine skyrmions driven periodically over random quenched disorder and show that there is a transition from reversible motion to a state in which the skyrmion trajectories are chaotic or irreversible. We find that the characteristic time required for the system to organize into a steady reversible or irreversible state exhibits a power law divergence near a critical ac drive period, with the same exponent as that observed for reversible to irreversible transitions in periodically sheared colloidal systems, suggesting that the transition can be described as an absorbing phase transition in the directed percolation universality class. We compare our results to the behavior of an overdamped system and show that the Magnus term enhances the irreversible behavior by increasing the number of dynamically accessible orbits. We discuss the implications of this work for skyrmion applications involving the long time repeatable dynamics of dense skyrmion arrays.

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“…They evolve with the atomic rearrangement. However, the presence of bigger particles makes the boundary stronger as we showed in our previous work [23]. In the case of an amorphous solid, there is no long-range ordering.…”

Section: Model and Simulation Detailsmentioning

confidence: 59%

“…To understand the energy dissipation during the plastic events, one computes the hysteresis loop area from the shear stress against the applied strain. In our previous study, we have shown that the hysteresis loop area sharply increases as strain amplitude reaches a threshold value in case of a polycrystalline system [23]. In a similar study, Laurson et al [40] have shown that cyclically stressed crystalline solids exhibit two phases: jammed and the moving state by computing hysteresis loop area.…”

Section: B Dynamic Modulusmentioning

confidence: 70%

“…Plastic deformation of colloidal polycrystals has been studied in experiments and in simulations [20][21][22]. In a previous study, we have shown that polycrystals also exhibit yielding transition mediated via defects motion depending on the strain amplitude of oscillatory shear [23]. There are few studies [24,25] comparing polycrystals and amorphous solids, though this could shed light on the nature of yielding transition.…”

Section: Introductionmentioning

confidence: 99%

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Irreversible transition of amorphous and polycrystalline colloidal solids under cyclic deformation

2018

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Cyclic loading on granular packings and amorphous media leads to a transition from reversible elastic behavior to an irreversible plasticity. In the present study, we investigate the effect of oscillatory shear on polycrystalline and amorphous colloidal solids by performing molecular dynamics simulations. Our results show that close to the transition, both systems exhibit enhanced particle mobility, hysteresis, and rheological loss of rigidity. However, the rheological response shows a sharper transition in the case of the polycrystalline sample as compared to the amorphous solid. In the polycrystalline system, we see the disappearance of disclinations, which leads to the formation of a monocrystalline system, whereas the amorphous system hardly shows any ordering. After the threshold strain amplitude, as we increase the strain amplitude both systems get fluid. In addition to that, particle displacements are more homogeneous in the case of polycrystalline systems as compared to the amorphous solid, mainly when the strain amplitude is larger than the threshold value. We do not see any effect of oscillation frequency on the reversible-irreversible transition.

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Irreversibility transition of colloidal polycrystals under cyclic deformation

Cited by 14 publications

References 28 publications

Critical behavior near the reversible-irreversible transition in periodically driven vortices under random local shear

Critical behavior near the reversible-irreversible transition in periodically driven vortices under random local shear

Reversible to irreversible transitions in periodically driven skyrmion systems

Irreversible transition of amorphous and polycrystalline colloidal solids under cyclic deformation

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