Vortex dynamics in two-dimensional systems at high driving forces

Fangohr, Hans; Cox, Simon J.; Groot, P.A.J. de

doi:10.1103/physrevb.64.064505

Cited by 85 publications

(83 citation statements)

References 41 publications

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“…Taking into account this effect, Giamarchi and Le Doussal [60] show that the system should decouple in elastic channels and predict the existence of threshold for transverse depinning. These features have been then observed in simulations [72]. For an extensive discussion of other aspects of the dynamics we refer to Ref.…”

Section: Moving Phases Hysteresis and Avalanchesmentioning

confidence: 93%

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Deblocking of interacting particle assemblies: from pinning to jamming

Miguel¹,

Andrade²,

Zapperi³

2003

Braz. J. Phys.

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A wide variety of interacting particle assemblies driven by an external force are characterized by a transition between a blocked and a moving phase. The origin of this deblocking transition can be traced back to the presence of either external quenched disorder, or of internal constraints. The first case belongs to the realm of the depinning transition, which, for example, is relevant for flux-lines in type II superconductors and other elastic systems moving in a random medium. The second case is usually included within the so-called jamming scenario observed, for instance, in many glassy materials as well as in plastically deforming crystals. Here we review some aspects of the rich phenomenology observed in interacting particle models. In particular, we discuss front depinning, observed when particles are injected inside a random medium from the boundary, elastic and plastic depinning in particle assemblies driven by external forces, and the rheology of systems close to the jamming transition. We emphasize similarities and differences in these phenomena.

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Section: Moving Phases Hysteresis and Avalanchesmentioning

confidence: 93%

“…It is also possible to analyze the tearing of the lattice studying its topological properties (i.e. the presence of defects, such as dislocations) [67,71,72]. To understand theoretically plastic depinning several authors have introduced simplified lattice models, which are possibly amenable to analytical treatment.…”

Section: Plastic Depinningmentioning

confidence: 99%

Deblocking of interacting particle assemblies: from pinning to jamming

Miguel¹,

Andrade²,

Zapperi³

2003

Braz. J. Phys.

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“…In this paper, we first study transport in the Corbino disk by T = 0 molecular dynamics (MD) simulations of interacting vortices [24,25,26]. As in the experiments, for low currents we find a linear velocity profile that corresponds to the rigid rotation of the vortex lattice.…”

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confidence: 99%

Tearing transition and plastic flow in superconducting thin films

Miguel

Zapperi

2003

Nature Mater

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A new class of artificial atoms, such as synthetic nanocrystals or vortices in superconductors, naturally self-assemble into ordered arrays. This property makes them applicable to the design of novel solids, and devices whose properties often depend on the response of such assemblies to the action of external forces. Here we study the transport properties of a vortex array in the Corbino disk geometry by numerical simulations. In response to an injected current in the superconductor, the global resistance associated to vortex motion exhibits sharp jumps at two threshold current values. The first corresponds to a tearing transition from rigid rotation to plastic flow, due to the reiterative nucleation around the disk center of neutral dislocation pairs that unbind and glide across the entire disk. After the second jump, we observe a smoother plastic phase proceeding from the coherent glide of a larger number of dislocations arranged into radial grain boundaries.The production of ordered self-assembled structures of various materials as diverse as synthetic nanocrystals, magnetic colloids, charged particles in Coulomb crystals, proteins and surfactants, or vortices in type II superconductors and in Bose-Einstein condensates, has attracted much interest for various fundamental and practical reasons which are ultimately concerned with their collective properties (optical, magnetic, mechanical, or transport 1

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“…In Koshelev-Vinokur theory, the re-crystallization current I p increases as (T m − T ) −1 on approaching the equilibrium melting temperature T m of the static system. Later calculations [3,4,5] and simulations [6,7,8,9] identified the free flowing state above I p as the smectic phase. In the smectic phase, the particles move in static channels with quasi-long range order perpendicular to the flow compared with liquid like short range order within the channels [10].…”

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confidence: 99%

Dynamic transition in driven vortices across the peak effect in superconductors

2003

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We study the zero-temperature dynamic transition from the disordered flow to an ordered flow state in driven vortices in type-II superconductors. The transition current Ip is marked by a sharp kink in the V (I) characteristic with a concomitant large increase in the defect concentration. On increasing magnetic field B, the Ip(B) follows the behaviour of the critical current Ic(B). Specifically, in the peak effect regime Ip(B) increases rapidly along with Ic. We also discuss the effect of varying disorder strength on Ip.

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Vortex dynamics in two-dimensional systems at high driving forces

Cited by 85 publications

References 41 publications

Deblocking of interacting particle assemblies: from pinning to jamming

Deblocking of interacting particle assemblies: from pinning to jamming

Tearing transition and plastic flow in superconducting thin films

Dynamic transition in driven vortices across the peak effect in superconductors

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