1999/09/30 by Yu. G. Pashkevich, V. A. Blinkin, V. P. Gnezdilov +13
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Charge (physics) #Condensed matter physics #Conductivity #Magnetic and transport properties of perovskites and related materials #Optics #Order (exchange) #Phonon #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Raman spectroscopy #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.84.3919
4 pages, 2-col style, including 5 eps figures; Fig.2 replaced with new Raman data plus some small changes to the text
arxiv created 1999/12/09 · openalex publication_date 2000/04/24 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.