Analysis of fluctuation conductivity of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}}-PrBa{sub 2}Cu{sub 3}O{sub 7-{delta}} superlattices

Journal Article · Tue Apr 01 00:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.8551· OSTI ID:541948

Solovjov, A L; Dmitriev, V M ^[1]; Habermeier, H ^[2]; Trofimov, I E ^[3]

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1. B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, 47 Lenin Avenue, 310164 Kharkov (Ukraine)
2. Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, D-70569 Stuttgart (Germany)
3. P. N. Lebedev Physics Institute, Russian Academy of Sciences, 53 Leninskij Avenue, 117924 Moscow (Russia)

The fluctuation-induced conductivity measured on YBa{sub 2}Cu{sub 3}O{sub 7-{delta}}-PrBa{sub 2}Cu{sub 3}O{sub 7-{delta}} superlattices (SL) is analyzed using various theoretical models describing weak fluctuations in layered superconductors and considering both Aslamazov-Larkin (AL) and Maki-Thompson (MT) terms. From the analysis {xi}{sub c}(0)=1.6{plus_minus}0.1 {Angstrom} and {tau}{sub {phi}}(100 K){approx_equal}3{times}10{sup {minus}13} s in clean limit are derived for the interlayer coherence length and temperature-dependent phase-relaxation time, respectively. Large {tau}{sub {phi}} values and AL-MT crossover revealed for all samples studied are attributed to the two-dimensional electronic state nature of SL above the crossover temperature. Possible mechanisms of charge scattering in high-T{sub c} superconductors are also discussed. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 541948
• Journal Information: Physical Review, B: Condensed Matter, Vol. 55, Issue 13; Other Information: PBD: Apr 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HIGH-TC SUPERCONDUCTORS
ELECTRIC CONDUCTIVITY
YTTRIUM OXIDES
BARIUM OXIDES
COPPER OXIDES
PRASEODYMIUM OXIDES
SUPERLATTICES
FLUCTUATIONS
ELECTRONIC STRUCTURE
ELECTRON-PHONON COUPLING
ELECTRON CORRELATION
TEMPERATURE DEPENDENCE
COHERENCE LENGTH
ELECTRON GAS
TWO-DIMENSIONAL CALCULATIONS