High-frequency electrodynamics of Bi2Sr2CaCu2O8+δ: Nonlinear response in the vortex state

R. Mallozzi, J. Orenstein, J. N. Eckstein, I. Bozovic

Research output: Contribution to journalArticlepeer-review

Abstract

Coherent terahertz spectroscopy is used to measure the complex conductivity of thin films of Bi2Sr2CaCu2O8+δ 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 Δσ(H) ≡ σ(H) - σ(0) on magnetic field. Over a broad range of field and temperature, Δσ2 varies as Hα, with α ≈ 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.

Original languageEnglish (US)
Pages (from-to)1485-1488
Number of pages4
JournalPhysical review letters
Volume81
Issue number7
DOIs
StatePublished - 1998
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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