Anisotropy in the electronic screening of oxygen lattice modes in YBa(2)Cu(3)O(6.95)

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dc.creatorMcQueeney, R. J.
dc.creatorEgami, T.
dc.creatorChung, J. -H.
dc.creatorPetrov, Y.
dc.creatorYethiraj, M.
dc.creatorArai, M.
dc.creatorInamura, Y.
dc.creatorEndoh, Y.
dc.creatorFrost, C.
dc.creatorDogan, F.
dc.date2001-05-30
dc.date.accessioned2026-07-07T02:41:36Z
dc.date.available2026-07-07T02:41:36Z
dc.descriptionInelastic neutron scattering data from a twinned single-crystal of YBa2Cu3O6.95 are presented that show a distinct a-b plane anisotropy in the oxygen vibrations. The Cu-O bond-stretching type phonons are simultaneously observed along the a and b directions due to a 4 meV splitting arising from the orthorhombicity. The present results show the bond-stretching branch along b (parallel to the chain) has a continuous dispersion, while the branch along a is discontinuous, suggesting a possibility of short-range cell-doubling along a. Furthermore, the LO mode along a is split in en-ergy from its TO partner at non-zero q-vectors, while the b mode is not. These results imply strong anisotropy in the electronic screening and a one-dimensional character in underlying charge fluctuations.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0105593
dc.identifierhttp://arxiv.org/abs/cond-mat/0105593
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17807
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleAnisotropy in the electronic screening of oxygen lattice modes in YBa(2)Cu(3)O(6.95)
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