Fluctuations in the Hall conductivity and dynamics of the order parameter in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] superconductors

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.1246· OSTI ID:5335257

Samoilov, A V ^[1]

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1. P. L. Kapitza Institute for Physical Problems, ul. Kosygina 2, Moscow 117334 (Russian Federation)

Fluctuation contributions to the Hall and longitudinal conductivities in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] epitaxial films have been investigated. Two remarkable features were observed: (1) the fluctuation contribution to the Hall conductivity, [sigma][sub [ital x][ital y]][sup fl], changes sign at temperatures [ital T][sup *]([ital H])[gt][ital T][sub [ital c]]([ital H]=0) and (2) the ratio [sigma][sub [ital x][ital y]][sup fl]/[sigma][sub [ital x][ital x]][sup fl] where [sigma][sub [ital x][ital x]][sup fl] is the fluctuation longitudinal conductivity, shows a sharp minimum near [ital T][sub [ital c]]([ital H]). These features may reflect an unusual behavior of the imaginary part of the relaxation time of the order parameter in the vicinity of the transition temperature.

• OSTI ID: 5335257
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:2; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CUPRATES
FLUCTUATIONS
HALL EFFECT
HIGH-TC SUPERCONDUCTORS
ORDER PARAMETERS
OXIDES
OXYGEN COMPOUNDS
RELAXATION TIME
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES