title: Stripe conductivity in La1.775Sr0.225NiO4
abstract: We report Raman light-scattering and optical conductivity measurements on a single crystal of La1.775Sr0.225NiO4 which exhibits incommensurate charge-stripe order. The extra phonon peaks induced by stripe order can be understood in terms of the energies of phonons that occur at the charge-order wave vector Q(c). A strong Fano antiresonance for a Ni-O bond-stretching mode provides clear evidence for finite dynamical conductivity within the charge stripes.
authors.affiliation: A. A. Galkin Donetsk Phystech NASU, 83114 Donetsk, Ukraine.
authors.initials: YG
authors.lastname: Pashkevich
authors.initials: VA
authors.lastname: Blinkin
authors.initials: VP
authors.lastname: Gnezdilov
authors.initials: VV
authors.lastname: Tsapenko
authors.initials: VV
authors.lastname: Eremenko
authors.initials: P
authors.lastname: Lemmens
authors.initials: M
authors.lastname: Fischer
authors.initials: M
authors.lastname: Grove
authors.initials: G
authors.lastname: Guntherodt
authors.initials: L
authors.lastname: Degiorgi
authors.initials: P
authors.lastname: Wachter
authors.initials: JM
authors.lastname: Tranquada
authors.initials: DJ
authors.lastname: Buttrey