Lattice deformations and plastic flow through bottlenecks in a two-dimensional model for flux pinning in type-II superconductors

Jensen, Henrik Jeldtoft; Brass, Andy; Berlinsky, A. J.

doi:10.1103/physrevlett.60.1676

Cited by 195 publications

(213 citation statements)

References 8 publications

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“…With this approach it has been possible to reproduce flux profiles [37], hysteresis [37], avalanches [36,39,40] and plastic flow [35,40]. One of the aims of these studies [37] is to establish precise connections between the microscopic models and the macroscopic behavior, captured for instance by generalized Bean models.…”

Section: Gradient Driven Dynamics: Front Invasionmentioning

confidence: 99%

“…A widely used modeling strategy to describe the fluctuations around the Bean state consists of numerical simulations of interacting vortices, pinned by quenched random impurities [35][36][37][38][39][40]. With this approach it has been possible to reproduce flux profiles [37], hysteresis [37], avalanches [36,39,40] and plastic flow [35,40].…”

Section: Gradient Driven Dynamics: Front Invasionmentioning

confidence: 99%

“…The channel structure of the dynamics has been studied thoroughly in the literature analyzing the statistical properties of particle trajectories [35,40,71]. In Fig.…”

Section: Plastic Depinningmentioning

confidence: 99%

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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: Gradient Driven Dynamics: Front Invasionmentioning

confidence: 99%

Section: Gradient Driven Dynamics: Front Invasionmentioning

confidence: 99%

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Deblocking of interacting particle assemblies: from pinning to jamming

Miguel¹,

Andrade²,

Zapperi³

2003

Braz. J. Phys.

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“…Recently, however, a more complex form of vortex motion has been considered. Several theoretical studies [6][7][8][9] and numerical simulations [10][11][12][13][14] have discussed in detail the possible dynamical phases of driven vortices in superconductors. Many of them agree with each other regarding the following aspects.…”

Section: Introductionmentioning

confidence: 99%

Location-sensitive measurement of the local fluctuation of driven vortex density inBi2Sr2CaCu
Maeda
¹
,
Tsuboi
²
,
Abiru
³

et al. 2002
Phys. Rev. B
24
3
14
0
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To investigate the dynamics of driven vortices in superconductors, noise in the local vortex density was investigated in the mixed state of a high-Tc superconductor, Bi2Sr2CaCu2Oy, using a twodimensional electron gas (2DEG) micro-Hall probe array. We studied the cross-correlation function, together with the auto-correlation function, both parallel and perpendicular to the direction of flow of the vortices. The broadband noise (BBN) did not have large spatial correlations. This suggests that the BBN is due to the fluctuation of the local vortex density generated by bulk pinning centers under the area of each probe. On the other hand, the narrow-band noise (NBN) (with the the time scale of the transit time of vortices) had large translational correlations. These definitely shows that the NBN was generated by semimacroscopic imperfections like the surface, and macroscopic line defects etc.. In relation to the dynamic phase diagram, large BBN was observed when the vortices started moving. The dependence of the spatial correlations on the direction of the array relative to the direction of the driving current suggested that plastic flow was present when the large BBN was observed. The gross features of our data agree well with some of the theoretically proposed dynamical phase diagrams of vortices in superconductors.

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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.…”

mentioning

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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Lattice deformations and plastic flow through bottlenecks in a two-dimensional model for flux pinning in type-II superconductors

Cited by 195 publications

References 8 publications

Deblocking of interacting particle assemblies: from pinning to jamming

Deblocking of interacting particle assemblies: from pinning to jamming

Location-sensitive measurement of the local fluctuation of driven vortex density inBi2Sr2CaCu
Maeda
¹
,
Tsuboi
²
,
Abiru
³

et al. 2002
Phys. Rev. B
24
3
14
0
View full text Add to dashboard Cite

Tearing transition and plastic flow in superconducting thin films

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Lattice deformations and plastic flow through bottlenecks in a two-dimensional model for flux pinning in type-II superconductors

Cited by 195 publications

References 8 publications

Deblocking of interacting particle assemblies: from pinning to jamming

Deblocking of interacting particle assemblies: from pinning to jamming

Location-sensitive measurement of the local fluctuation of driven vortex density inBi2Sr2CaCuMaeda1, Tsuboi2, Abiru3 et al. 2002Phys. Rev. B243140View full textAdd to dashboardCite

Tearing transition and plastic flow in superconducting thin films

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About

Location-sensitive measurement of the local fluctuation of driven vortex density inBi2Sr2CaCu
Maeda
¹
,
Tsuboi
²
,
Abiru
³

et al. 2002
Phys. Rev. B
24
3
14
0
View full text Add to dashboard Cite