Fluctuation conductivity of layered superconductors in a perpendicular magnetic field

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.12951· OSTI ID:5990723

Dorin, V V; Klemm, R A; Varlamov, A A ^[1]; Buzdin, A I ^[2]; Livanov, D V ^[3]

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1. Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)
2. Institute for High Pressure Physics, Academy of Sciences of Russia, Troitsk 142092 (Russian Federation) Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)
3. Moscow Institute of Steel and Alloys, Leninskii Prospect 4, Moscow 117936 (Russian Federation)

The leading contributions to the [ital c]-axis conductivity of layered superconductors arising from superconducting fluctuations of the order parameter are discussed for arbitrary intralayer scattering. The contributions from fluctuations of the normal quasiparticle density of states are shown to be opposite in sign to the Aslamazov-Larkin and Maki-Thompson contributions, leading to a peak in the overall [ital c]-axis resistivity [rho][sub [ital c]]([ital T]) above [ital T][sub [ital c]]. This peak is enhanced by a magnetic field [bold H][parallel][bold [cflx c]]. With increasing [ital H], the relative peak maximum in [rho][sub [ital c]]([ital T],[ital H]) increases in magnitude and is shifted to lower temperatures by an amount proportional to [ital H][sup 2] for weak fields and to [ital H] for strong fields. For comparison, the fluctuation conductivity parallel to the layers has been calculated including the fluctuations of the normal density of states. Our results are discussed in regard to recent experiments with YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] and Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8+[delta]].

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5990723
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:17; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

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665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FLUCTUATIONS
MAGNETIC FIELDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES