1997/01/31 by Ch. Helm, Ch. Preis, F. Forsthofer +5 · 1 citation
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.79.737
published as Phys. Rev. Lett. 79,4 (1997), 737 · 4 pages, 3 figures, revtex, aps, epsf, psfig. submitted to Physical Review Letters, second version improved in detail
arxiv created 1997/03/17 · openalex publication_date 1997/07/28 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
The recently reported subgap structures in the current-voltage characteristic of intrinsic Josephson junctions in the high- Tc superconductors Tl2Ba2Ca2Cu3O_10+\ensuremathδ and Bi2Sr2CaCu2O_8+\ensuremathδ 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.