Tilt-modulus enhancement of the vortex lattice in the layered superconductor 2 H -NbSe sub 2

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.1004· OSTI ID:6548964

Koorevaar, P; Aarts, J; Berghuis, P; Kes, P H ^[1]

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1. Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9506, 2300 RA Leiden (The Netherlands)

The field dependence of the pinning force has been studied in thin single crystals of the layered superconductor 2{ital H}-NbSe{sub 2} in fields directed perpendicular to the layers. At high fields a peak effect is observed which sets in at about {ital B}{sub co}{approx}0.8{ital B}{sub {ital c}2}. Below this field the pinning force agrees well with the theory of two-dimensional collective pinning. The onset of the peak is triggered by the transition to three-dimensional flux-line lattice (FLL) disorder at the field {ital B}{sub co}. Comparison of the crossover field with the criterion set by the collective-pinning theory reveals that the tilt modulus of the FLL in a layered superconductor is considerably reduced. The reduction factor corresponds very well to recent theoretical predictions. These results are of importance for the prediction of depinning and flux-line lattice melting in all kinds of anisotropic superconductors.

• OSTI ID: 6548964
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 42:1; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
NIOBIUM SELENIDES
MAGNETIC FLUX
ANISOTROPY
LAYERS
MONOCRYSTALS
TYPE-II SUPERCONDUCTORS
CHALCOGENIDES
CRYSTALS
NIOBIUM COMPOUNDS
REFRACTORY METAL COMPOUNDS
SELENIDES
SELENIUM COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360603* - Materials- Properties
656100 - Condensed Matter Physics- Superconductivity