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Budhani, R. C.; Suenaga, M.; Liou, Sy‐Hwang

doi:10.1103/physrevlett.69.3816

Cited by 149 publications

(46 citation statements)

References 24 publications

(25 reference statements)

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“…Heavy-ion irradiation generally produces a random array of parallel columnar defects. The effects of such an array of extended defects on the properties of the mixed phase of HTSCs have been extensively studied experimentally [2][3][4][5] , theoretically [6][7][8] and numerically 9,10 . The thermodynamics of a collection of vortex lines in the presence of a parallel array of random columnar pins has been analyzed 6,8 by mapping the problem to the quantum mechanics of a system of two-dimensional interacting bosons in an external random potential.…”

Section: Introductionmentioning

confidence: 99%

Vortices in layered superconductors with columnar pins: A density-functional study

Dasgupta

Valls²

2002

Phys. Rev. B

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We use numerical minimization of a model free energy functional to study the effects of columnar pinning centers on the structure and thermodynamics of a system of pancake vortices in the mixed phase of highly anisotropic layered superconductors. The magnetic field and the columnar pins are assumed to be perpendicular to the layers. Our methods allow us to study in detail the density distribution of vortices in real space. We present results for the dependence of the average number of vortices trapped at a pinning center on temperature and pinning strength, and for the effective interaction between nearby pinned vortices arising from short-range correlations in the vortex liquid. For a commensurate, periodic array of pinning centers, we find a line of first order vortex lattice melting transitions in the temperature T vs. pin concentration c plane, which terminates at an experimentally accessible critical point as c is increased. Beyond this point, the transition is replaced by a crossover. Our results should also apply, with little change, to thin-film superconductors with strong point pinning.

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Section: Introductionmentioning

confidence: 99%

Vortices in layered superconductors with columnar pins: A density-functional study

Dasgupta

Valls²

2002

Phys. Rev. B

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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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“…Images are produced from the best available original document (l) ' (a) , L. Krusin-Elbaum (,) , J.R. Thompson (2) (4) , R. Wheeler (3) , A.D.…”

Section: Disclaimermentioning

confidence: 99%

“…Kirk (3) , Y.R. Sun (4) , F. Holtzberg (,) , and C. Feild (1) (,) IBM Research, Yorktown Heights NY 10598-0218, USA (2) Oak Ridge National Laboratory, Oak Ridge TN 37831-6061, USA * 'Argonne National Laboratory, Argonne IL 60439, USA * 'Department of Physics, University of Tennessee, Knoxville, TN 37996, USA RECENTLY we have shown that aligned columns of damaged material in high temperature superconductors, installed by the irradiation with swift (~GeV) heavy ions such as Sn, pin magnetic vortices much more effectively than point defects .…”

Section: Disclaimermentioning

confidence: 99%