High-Frequency Electrodynamics of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8 +{ital {delta}}}thinsp: Nonlinear Response in the Vortex State

Journal Article · Sat Aug 01 04:00:00 EDT 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.81.1485· OSTI ID:643590

Mallozzi, R; Orenstein, J ^[1]; Eckstein, J N; Bozovic, I ^[2]

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1. Materials Sciences Division, Lawrence Berkeley National Laboratory and Physics Department, University of California, Berkeley, California 94720 (United States)
2. E. L. Ginzton Research Center, Varian Associates, Inc., Palo Alto, California 94304-1025 (United States)

Coherent terahertz spectroscopy is used to measure the complex conductivity of thin films of Bi{sub 2}Sr {sub 2}CaCu{sub 2}O{sub 8+{delta}} in the vortex state as a function of frequency, temperature, and applied magnetic field. We report an unusual sublinear power law dependence of the high-frequency magnetoconductivity {Delta}{sigma}(H){equivalent_to}{sigma}(H) {minus}{sigma}(0) on magnetic field. Over a broad range of field and temperature, {Delta}{sigma}{sub 2} varies as H{sup {alpha}} , with {alpha}{approx} ( 1) /(2) . We present a model based on the nonlinear London electrodynamics predicted for a d-wave superconductor which quantitatively explains these results using only parameters obtained from zero-field measurements. {copyright} {ital 1998} {ital The American Physical Society}

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 643590
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 81; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRODYNAMICS
FREQUENCY DEPENDENCE
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
THIN FILMS
VORTICES