Anderson localization and layered superconductor 2H-NbSe[sub 2-x]S[sub x]

Journal Article · Wed Mar 31 23:00:00 EST 1993 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00132088· OSTI ID:6325730

Sugawara, Ken; Yokota, Kazuhide; Takemoto, Jiro; Tanokura, Yoshiko; Sekine, Tomoyuki ^[1]

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1. Sophia Univ., Tokyo (Japan)

The zero-field critical temperature and the coherence length in the layered superconductor 2H-NbSe[sub 2-x]S[sub x] (x=0-2.0) were investigated. The zero-field critical temperature decreases with increasing the residual resistivity. This result can be explained in terms of the three-dimensional Anderson localization with the mobility edge below the Fermi level. The coherence length as a function of x can be explained by the theory of the anisotropic three-dimensional dirty superconductor. However it shows anomalous behavior when x-0.6. This may be relevant to the change of the crystal structure or the disappearance of the CDW. The effective mass ratio does not depend on x when x[le]0.4.

• OSTI ID: 6325730
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 91:1-2; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
CHALCOGENIDES
COHERENCE LENGTH
CRYSTAL STRUCTURE
DIMENSIONS
EFFECTIVE MASS
ELEMENTS
ENERGY LEVELS
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
HYDROGEN
LENGTH
MASS
NIOBIUM COMPOUNDS
NIOBIUM SULFIDES
NONMETALS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SELENIUM COMPOUNDS
SELENIUM SULFIDES
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE