Vortex confinement by columnar defects in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns

Civale, L.; Marwick, A. D.; Worthington, T. K.; Kirk, Marquis A.; Thompson, James R.; Krusin‐Elbaum, L.; Sun, Yang; Clem, John R.; Holtzberg, F.

doi:10.1103/physrevlett.67.648

Cited by 1,211 publications

(456 citation statements)

References 14 publications

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“…Our aim is to once again compare the critical-state performance of type-II superconductors threaded by conventional columnar pins [18] with that of type-II superconductors threaded by heterogeneous (d-wave) pinning lines that can result from the strain field about nano-column inclusions in YBCO [17]. The Abrikosov vortex lattice in a field of parallel columnar pins is in a Bose glass state characterized by an infinite macroscopic tilt modulus [22].…”

Section: Computer Simulation Of 2d Vortex Dynamicsmentioning

confidence: 99%

“…2). Both 2D collective pinning theory [6] [7] and direct computer simulation of 2D vortex dynamics obtain the following central result: that the critical current due to an arrangnement of weak heterogeneous columnar pins is equal to that expected from an arrangement of conventional columnar pins [18] obtained by unbinding the component pin/antipin lines from the heterogeneous cluster, and by then converting the isolated antipin lines that result into pin lines of equal strength. Figure 3 depicts the two pinning landscapes in question.…”

Section: Introductionmentioning

confidence: 99%

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Comparatively high in-field critical current in type-II superconductors from heterogeneous columnar pins: A molecular dynamics study

Rodriguez

Oswald

2009

Physica C: Superconductivity

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Theoretical work predicts that the strong dependence of T c on pure shear strain within the a-b plane of optimally doped YBa 2 Cu 3 O 7−δ results in heterogenous columnar pins of vortex lines about dislocation lines and about nano-columns inclusions aligned in parallel to the c axis. The critical current of a rigid vortex lattice driven by the Lorentz force in the presence of such clusters of pin/antipin lines is computed using two-dimensional (2D) collective pinning theory and by numerical simulation of the corresponding 2D vortex dynamics. Both theory and computer calculation find that the antipin component of the heterogenous columnar pins contributes substantially to the net in-field critical current.

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Section: Computer Simulation Of 2d Vortex Dynamicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparatively high in-field critical current in type-II superconductors from heterogeneous columnar pins: A molecular dynamics study

Rodriguez

Oswald

2009

Physica C: Superconductivity

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“…Chemical and structural imperfections in the material naturally lead to random α( r) with only short-range correlations. Correlated random static disorder is also possible and might arise from grain or twin boundaries, screw dislocations, artificially created ion columnar tracks [49,50], or from an epitaxial multilayers and e-beam written patterns. Finally the crystal structure itself, such as for example the CuO 2 layers of the high-T c superconductors, provides a natural modulation of T c ( r) describable by a periodic α( r).…”

Section: Static Disordermentioning

confidence: 99%

Statistical Mechanics of Vortices in Type-II Superconductors

Huse

Radzihovsky

1994

Fundamental Problems in Statistical Mechanics, VIII

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Thermal fluctuations and disorder play an essential role in high-T c superconductors. After reviewing the mean-field phase diagram we describe significant modifications that result when the effects of finite temperature and disorder are incorporated. Thermal fluctuations cause the melting of the Abrikosov flux line lattice into a vortex liquid at high temperatures, and disorder produces novel glass phases at low temperatures. We analyze phase transitions between these new phases and describe transport properties in various regimes.

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“…For the multilayer device fabrication in semiconductor technology, ion implantation has commonly been in use for last few decades. In high temperature superconducting materials, the ion implantation technique has been used for modifying the structure and improving some critical parameters of superconductors with various types of ions [10][11][12][13][14][15][16][17][18][19][20]. The idea of using the ion implantation technique with suitable ion energy and dose for the purpose of creating an insulating layer serving as a separator between the superconducting layers was the main motive of this work.…”

Section: Introductionmentioning

confidence: 99%

Developing a trilayer processing technique for superconducting Y Ba₂Cu₃O_7−δthin films by using Ge ion implantation

Avci¹,

Tepe²,

Öktem³

et al. 2005

Supercond. Sci. Technol.

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For making trilayer superconducting devices based on YBa 2 Cu 3 O 7−δ (YBCO) thin film processing, we developed a new technique by employing Ge ion implantation. A YBCO thin film of 150 nm thickness having high c-axis orientation and a transition temperature, T c , of 90 K was implanted with 80 keV, 1 × 10 16 Ge ions cm −2 at room temperature. By the result of TRIM calculation, Ge ions were found to penetrate into the YBCO thin film approximately 60 nm below the surface of the film, thus leaving the lower part of the film as a superconductor. Upon implantation with Ge ions, the implanted upper part of the sample lost its electrical conductivity and diamagnetism while its original crystalline structure was preserved. The implanted ions we found did not alter the overall crystal structure of the YBCO thin film; this allowed us to grow an epitaxial superconducting upper layer of YBCO on top of the implanted area, leaving no need to use any buffer layer. The superconducting properties of the upper layer were similar to those of the pure YBCO base layer with an increased room temperature resistivity and a lowered T c (88 K). This process provides an effective method for fabrication of a trilayer HTS device structure.

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Vortex confinement by columnar defects inYBa2Cu3

Cited by 1,211 publications

References 14 publications

Comparatively high in-field critical current in type-II superconductors from heterogeneous columnar pins: A molecular dynamics study

Comparatively high in-field critical current in type-II superconductors from heterogeneous columnar pins: A molecular dynamics study

Statistical Mechanics of Vortices in Type-II Superconductors

Developing a trilayer processing technique for superconducting Y Ba₂Cu₃O_7−δthin films by using Ge ion implantation

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Vortex confinement by columnar defects inYBa2Cu3

Cited by 1,211 publications

References 14 publications

Comparatively high in-field critical current in type-II superconductors from heterogeneous columnar pins: A molecular dynamics study

Comparatively high in-field critical current in type-II superconductors from heterogeneous columnar pins: A molecular dynamics study

Statistical Mechanics of Vortices in Type-II Superconductors

Developing a trilayer processing technique for superconducting Y Ba2Cu3O7−δthin films by using Ge ion implantation

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Developing a trilayer processing technique for superconducting Y Ba₂Cu₃O_7−δthin films by using Ge ion implantation