Josephson plasma resonance in a single-layered cuprate Bi2(Sr,La)2CuOy
S. Sakamoto, A. Maeda, T. Hanaguri, Y. Kotaka, J. Shimoyama, K. Kishio, Y. Matsushita, M. Hasegawa, H. Takei, H. Ikeda, R. Yoshizaki
DOI 10.1103/PhysRevB.53.R14749 · Physical Review B
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Abstract
Microwave absorption was measured in the mixed state of (BiorTl)2(SrorBa)2Can−1CunOy. In a La-substituted Bi2Sr2CuOy (Bi-2201), a sharp resonant structure was found in the absorption as a function of magnetic field only when the microwave current flowed across the CuO2 planes, as well as in Bi2Sr2CaCu2Oy (Bi-2212). Together with the frequency-dependence data, the resonant structure in the absorption in Bi-2201 is considered to be the Josephson plasma resonance. The anisotropy ratio γ≡(mcmab)12 was tentatively estimated to be ∼ 750. A striking difference was found in the temperature dependence of the resonance field between Bi-2201 and Bi-2212. We argue that this comes from the difference in the dimensionality of the vortex systems. In Tl2Ba2CaCu2Oy, no such resonance was found in the micro-wave region, which is probably due to a smaller anisotropy in this material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 113 | Pressure not reported | unknown |
| Bi2Sr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89 | Pressure not reported | unknown |
| Bi2Sr2CuOy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
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