title: Phase diagram of La2-xSrxCuO4 probed in the infared: imprints of charge stripe excitations.
abstract: While there is increasing evidence for antiferromagnetic (AF) ordering in the Cu-O planes of high-T(c) superconductors, either static or fluctuating, there is no direct evidence so far for the charge stripes that should separate the AF domains. By investigating the optical response of La2-xSrxCuO4 for 0<or=x<or=0.26 and 30<or=T<or=295 K, we identify strong far infrared peaks whose energy, width, and intensity are consistent with a scenario of charge stripe dynamics in the Cu-O planes.
authors.affiliation: Coherentia-INFM and Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Roma, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Lucarelli
authors.forename: S
authors.initials: S
authors.lastname: Lupi
authors.forename: M
authors.initials: M
authors.lastname: Ortolani
authors.forename: P
authors.initials: P
authors.lastname: Calvani
authors.forename: P
authors.initials: P
authors.lastname: Maselli
authors.forename: M
authors.initials: M
authors.lastname: Capizzi
authors.forename: P
authors.initials: P
authors.lastname: Giura
authors.forename: H
authors.initials: H
authors.lastname: Eisaki
authors.forename: N
authors.initials: N
authors.lastname: Kikugawa
authors.forename: T
authors.initials: T
authors.lastname: Fujita
authors.forename: M
authors.initials: M
authors.lastname: Fujita
authors.forename: K
authors.initials: K
authors.lastname: Yamada