Coupling between Phonons and Intrinsic Josephson Oscillations in Cuprate Superconductors

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.737· OSTI ID:527063

Helm, C; Preis, C; Forsthofer, F; Keller, J ^[1]; Schlenga, K; Kleiner, R; Mueller, P ^[2]

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1. Institut fuer Theoretische Physik, Universitaet Regensburg, D-93040 Regensburg (Germany)
2. Physikalisches Institut III, Universitaet Erlangen-Nuernberg, D-91058 Erlangen (Germany)

The recently reported subgap structures in the current-voltage characteristic of intrinsic Josephson junctions in the high-T{sub c} superconductors Tl{sub 2}Ba {sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta} } and Bi{sub 2}Sr {sub 2}CaCu{sub 2}O{sub 8+{delta}} are explained by the coupling between c -axis phonons and Josephson oscillations. A model is developed where c -axis lattice vibrations between adjacent superconducting multilayers are excited by the Josephson oscillations in a resistive junction. The voltages of the lowest structures correspond well to the frequencies of longitudinal c -axis phonons with large oscillator strength in the two materials, providing a new measurement technique for this quantity. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 527063
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
BARIUM OXIDES
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
JOSEPHSON JUNCTIONS
LATTICE VIBRATIONS
OSCILLATOR STRENGTHS
PHONONS
STRONTIUM OXIDES
THALLIUM OXIDES