Vortex-line liquid phases: Longitudinal superconductivity in the lattice London model

Journal Article · Thu May 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.11706· OSTI ID:496740

Hagenaars, T J ^[1]; Brandt, E H ^[2]; Hetzel, R E; Hanke, W ^[1]; Leghissa, M; Saemann-Ischenko, G ^[3]

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1. Institut fuer Theoretische Physik, Universitaet Wuerzburg, Am Hubland, D-97074 Wuerzburg (Germany)
2. Max-Planck-Institut fuer Metallforschung, Institut fuer Physik, Postfach 800665, D-70506 Stuttgart (Germany)
3. Physikalisches Institut III, Universitaet Erlangen-Nuernberg, Erwin-Rommel-Strasse 1, D-91058 Erlangen (Germany)

We study the vortex-line lattice and liquid phases of a clean type-II superconductor by means of Monte Carlo simulations of the lattice London model. Motivated by a recent controversy regarding the presence, within this model, of a vortex-liquid regime with longitudinal superconducting coherence over long length scales, we directly compare two different ways to calculate the longitudinal coherence. For an isotropic superconductor, we interpret our results in terms of a temperature regime within the liquid phase in which longitudinal superconducting coherence extends over length scales larger than the system thickness studied. We note that this regime disappears in the moderately anisotropic case due to a proliferation, close to the flux-line lattice melting temperature, of vortex loops between the layers. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 496740
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 17 Vol. 55; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COHERENCE LENGTH
COMPUTERIZED SIMULATION
LONDON EQUATION
MAGNETIC FLUX
MIXED STATE
MONTE CARLO METHOD
PHASE STUDIES
TEMPERATURE DEPENDENCE
TYPE-II SUPERCONDUCTORS