| Autor: | Tetsu Wakabayashi, Ryo Nakamura, Saburo Takahashi, Itsuhiro Kakeya, Kazuo Kadowaki |
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| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | International Journal of Modern Physics B. 14:547 |
| ISSN: | 0217-9792 |
| Popis: | A strong temperature dependent phenomenon of the Josephson plasma resonance mode has been found in high-{Tc} superconductor Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} 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 {bar h}{omega}{sub p}(0) = 2.59 x 10{sup {minus}4} eV. Since the plasma frequency, {omega}{sub 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 understanding 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 quasi-particles in this system. |
| Databáze: | OpenAIRE |
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