Abrupt Change of Josephson Plasma Frequency at the Phase Boundary of the Bragg Glass in Bi2Sr2CaCu2O8+δ

M. B. Gaifullin; Yuji Matsuda; N. Chikumoto; J. Shimoyama; K. Kishio

doi:10.1103/PhysRevLett.84.2945

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Abrupt Change of Josephson Plasma Frequency at the Phase Boundary of the Bragg Glass in Bi2Sr2CaCu2O8+δ

M. B. Gaifullin, Yuji Matsuda, N. Chikumoto, J. Shimoyama, K. Kishio

DOI 10.1103/PhysRevLett.84.2945 · Physical Review Letters

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Abstract

We report the first detailed and quantitative study of the Josephson coupling energy in the vortex liquid, Bragg glass, and vortex glass phases of Bi2Sr2CaCu2O8+δ by the Josephson plasma resonance. The measurements revealed distinct features in the T and H dependencies of the plasma frequency ωpl for each of these three vortex phases. When going across either the Bragg-to-vortex glass or the Bragg-to-liquid transition line, ωpl shows a dramatic change. We provide a quantitative discussion on the properties of these phase transitions, including the first order nature of the Bragg-to-vortex glass transition.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	82.5	Pressure not reported	unknown