TEMPERATURE DEPENDENCE OF JOSEPHSON PLASMA MODES IN Bi2Sr2CaCu2O8+δ NEAR Tc

Autor:	Saburo Takahashi, Itsuhiro Kakeya, Ryo Nakamura, Tetsu Wakabayashi, Kazuo Kadowaki
Rok vydání:	2000
Předmět:	Coupling Physics Superconductivity Pi Josephson junction Condensed matter physics Quasiparticle Statistical and Nonlinear Physics Plasma Condensed Matter Physics Plasma oscillation Two-fluid model Quantum tunnelling
Zdroj:	International Journal of Modern Physics B. 14:547-554
ISSN:	1793-6578 0217-9792
Popis:	A strong temperature dependent phenomenon of the Josephson plasma resonance mode has been found in high-Tc superconductor Bi 2 Sr 2 CaCu 2 O 8+δ in a microwave frequency region between 9 and 50 GHz. The longitudinal plasma frequency sharply decreases and disappears just below Tc. The extrapolated plasma energy is estimated to be ℏω p (0)=2.59× 10-4 eV . Since the plasma frequency, ω p , is determined by the Anderson-Higgs–Kibble mechanism and it is expected to be temperature independent, this phenomenon can not be accounted for by the conventional underst and ing of the plasma mode in superconductors. Experimental results are discussed in terms of the two fluid model, in which the intrinsic Josephson nature of the coupling restricting the tunneling probability of quasiparticles between layers is considered to be as a dumping mechanism of the quasiparticles in this system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::11da45928becbcd9620bd95212de47d3 https://doi.org/10.1142/s0217979200000492 Zobrazit plný text záznamu