2012/10/12 by Ya. G. Ponomarev, Hoang Hoai Van, H. H. Van +5 · 2 citations
Chemistry · Physics and Astronomy · #Cuprate #Doping #Inorganic Fluorides and Related Compounds #Josephson effect #Phonon #Physics of Superconductivity and Magnetism #Superconductivity #Superconductivity in MgB2 and Alloys #Terahertz radiation #cond-mat.supr-con
paper · pdf · doi:10.1134/s0021364012230129
12 pages, 14 figures
arxiv created 2012/10/12 · openalex publication_date 2013/02/01 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Facts are presented evidencing a strong electron-phonon interaction in doped BSCCO superconductors. A pronounced fine structure in dI / dV characteristics of Josephson junctions has been observed which is caused by interaction of AC Josephson current with Raman-active optical phonon modes. “Quantization” of the “gap” voltage for natural nanosteps on the cryogenically cleaved surfaces of BSCCO proves the existence of the intrinsic Josephson effect. A sharp extra structure in the current-voltage characteristics of nanosteps is attributed to the presence of the extended van Hove singularity.