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20 April 2024

» pubmed » pmid11019239

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Stripe conductivity in La1.775Sr0.225NiO4
Y G Pashkevich ; V A Blinkin ; V P Gnezdilov ; V V Tsapenko ; V V Eremenko ; P Lemmens ; M Fischer ; M Grove ; G Guntherodt ; L Degiorgi ; P Wachter ; J M Tranquada ; D J Buttrey ;
Date:	24 Apr 2000
Journal:	Phys Rev Lett, 84 (17), 3919-22
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.
Source:	PubMed, pmid11019239
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