Spatially Resolved Dynamic Correlation in the Vortex State of High Temperature Superconductors

López, D.; Kwok, W. K.; Safar, H.; Olsson, Robert; Petrean, A. M.; Paulius, L. M.; Crabtree, G. W.

doi:10.1103/physrevlett.82.1277

Cited by 82 publications

(62 citation statements)

References 17 publications

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“…At low currents, the velocity profile follows a linear law, v(r) = ωr with angular velocity Ω ∝ I. This corresponds to a rigid rotation of the vortex crystal, as observed experimentally [21]. Above a threshold I 0 , the velocity profile starts to deform, with large tangential velocities in the center, which then decay towards the boundary.…”

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confidence: 84%

“…The vortex velocity profiles have been evaluated after measuring the voltage drop across a series of contacts placed radially on a YBa 2 Cu 3 O 7−δ disk [21]. For low currents and temperatures, all the vortices were found to move as a rigid solid, giving rise to a linear velocity profile v(r) = Ωr, where r is the distance from the disk center.…”

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confidence: 99%

“…The current-voltage (I-V) curve provides an indirect measure of vortex dynamics, because vortex motion induces an electric field proportional to the vortex velocities. It has been noticed that the sample boundary has an important effect on the moving vortex phase complicating the interpretation of the results [18,19]; a problem that is overridden in the Corbino disk geometry [15,19,20,21]. There the current is applied at the disk center and flows radially towards the boundary.…”

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confidence: 99%

“…As in previous experiments [21], we first measure azimuthal velocities v and compute the variation of the velocity profile v(r) with I (see Fig. 1).…”

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confidence: 99%

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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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confidence: 84%

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confidence: 99%

mentioning

confidence: 99%

“…As in previous experiments [21], we first measure azimuthal velocities v and compute the variation of the velocity profile v(r) with I (see Fig. 1).…”

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confidence: 99%

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Tearing transition and plastic flow in superconducting thin films

Miguel

Zapperi

2003

Nature Mater

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“…On the other hand, the long-range positive non-local resistance can arise from a correlated transverse motion of the vortex lattice [12]. The in-plane vortex-vortex correlations occurring on a millimeter scale have also been detected in Corbino-disk experiments [15,9]. The ratio R 14,56 (T)/R 14,23 (T) < 1, see Fig.…”

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confidence: 99%

Vortex lattice in Bi2Sr2CaCu2O8 well above the first-order phase transition boundary

Torres

Silva

Moehlecke

et al. 2004

Physica C: Superconductivity

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Measurements of non-local in-plane resistance originating from transverse vortexvortex correlations have been performed on a Bi 2 Sr 2 CaCu 2 O 8+δ high-T c superconductor in a magnetic field up to 9 T applied along the crystal c-axis. Our results demonstrate that a rigid vortex lattice does exist over a broad portion of the magnetic field -temperature (H-T) phase diagram, well above the first-order transition boundary H F OT (T). The results also provide evidence for the vortex lattice melting and vortex liquid decoupling phase transitions, occurring above the H F OT (T).

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