Stripe Conductivity in La{sub 1.775}Sr{sub 0.225}NiO{sub 4}

Journal Article · Mon Apr 24 04:00:00 EDT 2000 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.84.3919· OSTI ID:20216324

Pashkevich, Yu G ^[1]; Blinkin, V A ^[2]; Gnezdilov, V P ^[3]; Tsapenko, V V ^[3]; Eremenko, V V ^[3]; Lemmens, P ^[4]; Fischer, M ^[4]; Grove, M ^[4]; Guentherodt, G ^[4]; Degiorgi, L ^[5]

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1. A. A. Galkin Donetsk Phystech NASU, 83114 Donetsk, (Ukraine)
2. Institute for Single Crystals NASU, 310001 Kharkov, (Ukraine)
3. B. I. Verkin Institute for Low Temperature Physics NASU, 310164 Kharkov, (Ukraine)
4. 2. Physikalisches Institut, RWTH Aachen, 52056 Aachen, (Germany)
5. Laboratorium fuer Festkoerperphysik, ETH-Zuerich, CH-8093, Zuerich, (Switzerland)

We report Raman light-scattering and optical conductivity measurements on a single crystal of La{sub 1.775} Sr{sub 0.225} NiO{sub 4} 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{sub c} . A strong Fano antiresonance for a Ni-O bond-stretching mode provides clear evidence for finite dynamical conductivity within the charge stripes. (c) 2000 The American Physical Society.

• OSTI ID: 20216324
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 84; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHARGE STATES
EXPERIMENTAL DATA
FANO FACTOR
LANTHANUM OXIDES
LIGHT SCATTERING
NICKEL OXIDES
PHONONS
RAMAN SPECTRA
STRONTIUM OXIDES
X-RAY DIFFRACTION