Stripe Conductivity in La(1.775)Sr(0.225)NiO(4)

Details Stripe Conductivity in La(1.775)Sr(0.225)NiO(4) Stripe Conductivity in La(1.775)Sr(0.225)NiO(4)

1999-09-17

arxiv.org/abs/cond-mat/9909270v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2-col style, including 5 eps figures; Fig.2 replaced with new Raman data plus some small changes to the text

Scientific paper

10.1103/PhysRevLett.84.3919

We report Raman light-scattering and optical conductivity measurements on a single crystal of La(1.775)Sr(0.225)NiO(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_c. A strong Fano antiresonance for a Ni-O bond-stretching mode provides clear evidence for finite dynamical conductivity within the charge stripes.

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