Vortex lattice in type II superconductors under magnetic field in the presence of inhomogeneities

B. Rosenstein, B. Ya Shapiro, V. Zhuravlev

Research output: Contribution to journalArticlepeer-review

Abstract

We investigate the structure, elastic and dynamical properties of the vortex matter in the presence of artificially created or intrinsic gradients of the critical temperature in the framework of the Ginzburg-Landau theory. The region of parameters in which vortex cores are not well separated is treated perturbatively in 1 - Hc2 (T) / Hc2 (0). Critical current for periodic pinning potential is obtained and general expressions for elastic moduli at long wavelength are derived. We show that it is impossible to restrict the system to lowest Landau level. We use it to provide a theory of the discontinuous peak effect in critical current which appears near Hc2 (T) line in low Tc strongly type II superconductors. Influence of thermal fluctuations is also considered and we find softening of the shear modulus in the vicinity of vortex lattice melting line.

Original languageEnglish
Pages (from-to)621-626
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume468
Issue number7-10
DOIs
StatePublished - 1 Apr 2008

Bibliographical note

Funding Information:
It is a pleasure to thank V. Vinokur, E. Zeldov, E. Andrei, E. Sonin, P. Kes, B. Shapiro, D.P. Li, N. Kokubo, T. Maniv for discussions and sharing unpublished data with us. We are especially grateful to E.H. Brandt for numerous illuminating discussions during his two visits. The work is supported by NSC of R.O.C. No. 952112M009048 and the MOE ATU Program.

Funding

It is a pleasure to thank V. Vinokur, E. Zeldov, E. Andrei, E. Sonin, P. Kes, B. Shapiro, D.P. Li, N. Kokubo, T. Maniv for discussions and sharing unpublished data with us. We are especially grateful to E.H. Brandt for numerous illuminating discussions during his two visits. The work is supported by NSC of R.O.C. No. 952112M009048 and the MOE ATU Program.

FundersFunder number
MOE ATU
National Science Council952112M009048

    Keywords

    • Peak effect
    • Shear modulus
    • Vortex matter

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