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Martı́nez, J. C.; Schattke, A.; Jourdan, Martin; Jakob, G.; Adrian, H.

doi:10.1103/physrevb.61.9162

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…The limit of a two-dimensional vortex system is most obvious in the Kosterlitz-Thouless transition of bound vortex-antivortex pairs, which occurs for superlattices with very thin superconducting and thick decoupling layers [44][45][46][47][48]. Indications for the existence of Josephson coupling due to measurements of the direct c axis transport have been found in the current-voltage characteristics of mesa structures of YP superlattices [49]. Only few studies exist concerning the Hall effect and the normal state properties of such superlattices [50][51][52][53][54].…”

Section: Introductionmentioning

confidence: 97%

Vortex-creep activation energy in YBa2Cu3O7/PrBa2Cu3O7 superlattices

Tahan

Jakob

Adrian

et al. 2010

Physica C: Superconductivity

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Section: Introductionmentioning

confidence: 97%

Vortex-creep activation energy in YBa2Cu3O7/PrBa2Cu3O7 superlattices

Tahan

Jakob

Adrian

et al. 2010

Physica C: Superconductivity

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“…The anisotropy of the vortex dynamics in superlattices has been investigated by various authors, using transport measurements, and the shrinking of the irreversible part of the vortex phase diagram in the conditions of the reduced dimensionality of the vortex system due to the superlattice modulation has been evidenced [16][17][18][19]. Indications for the existence of Josephson coupling have been found in the c axis currentvoltage characteristics of mesa structures of YBCO/PrBCO superlattices [20].…”

Section: Introductionmentioning

confidence: 99%

Vortex creep crossover in YBCO/PrBCO superlattices during standard magnetization relaxation measurements

Tahan

Jakob

Miu

et al. 2011

Supercond. Sci. Technol.

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We investigated the relaxation of the irreversible magnetization in a series of 200 nm thick YBa 2 Cu 3 O 7 /PrBa 2 Cu 3 O 7 [(YBCO) n /(PrBCO) m ] superlattices, where the thickness m of the nonsuperconducting PrBCO layer (measured in unit cells) was kept to m = 4 (sufficient to decouple the superconducting YBCO layers), whereas the thickness n of the YBCO layer was varied between 2 and 20 unit cells. The analysis of standard zero-field-cooling dc magnetization relaxation data obtained in the low temperature T region with the applied magnetic field H oriented along the c axis reveals the occurrence of a crossover elastic (collective) vortex creep at low T -plastic vortex creep at high T , generated by the T dependent macroscopic currents induced in the sample during measurements. For thin superlattices (n < 20) the creep crossover temperature T cr ∝ n, and T cr decreases linearly with increasing ln(H ) for a fixed n. This crossover represents an alternative to the elastic vortex glass behavior reported for superlattices, as well as to 'quantum vortex creep' at unexpectedly high T inferred for thin films. We also discuss the absence of an increase of the magnetically determined critical current density with decreasing YBCO thickness in our superlattices, which apparently contradicts the collective pinning theories.

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Quasiparticle density of state in d-wave superconducting superlattice systems

Huang¹,

Mou²

2003

Physica C: Superconductivity

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c-axis tunneling inYBa2Cu3<

Cited by 3 publications

References 18 publications

Vortex-creep activation energy in YBa2Cu3O7/PrBa2Cu3O7 superlattices

Vortex-creep activation energy in YBa2Cu3O7/PrBa2Cu3O7 superlattices

Vortex creep crossover in YBCO/PrBCO superlattices during standard magnetization relaxation measurements

Quasiparticle density of state in d-wave superconducting superlattice systems

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