title: Josephson plasma resonance and phonon anomalies in trilayer Bi2Sr2Ca2Cu3O10.
abstract: The far-infrared (FIR) c axis conductivity of a Bi2223 crystal has been measured by ellipsometry. Below T(c) a strong absorption band develops near 500 cm(-1), corresponding to a transverse Josephson plasmon. The related increase in FIR spectral weight leads to a giant violation of the Ferrell-Glover-Tinkham sum rule. The gain in c axis kinetic energy accounts for a sizable part of the condensation energy. We also observe phonon anomalies which suggest that the Josephson currents lead to a drastic variation of the local electric field within the block of closely spaced CuO2 planes.
authors.affiliation: Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
authors.forename: A V
authors.initials: AV
authors.lastname: Boris
authors.forename: D
authors.initials: D
authors.lastname: Munzar
authors.forename: N N
authors.initials: NN
authors.lastname: Kovaleva
authors.forename: B
authors.initials: B
authors.lastname: Liang
authors.forename: C T
authors.initials: CT
authors.lastname: Lin
authors.forename: A
authors.initials: A
authors.lastname: Dubroka
authors.forename: A V
authors.initials: AV
authors.lastname: Pimenov
authors.forename: T
authors.initials: T
authors.lastname: Holden
authors.forename: B
authors.initials: B
authors.lastname: Keimer
authors.forename: Y-L
authors.initials: YL
authors.lastname: Mathis
authors.forename: C
authors.initials: C
authors.lastname: Bernhard