Dielectric signatures of lattice instabilities at 32K and 245K in $La_{2-y}Sr_{y}MO_{4+x}$ (M=Cu,Ni) Cuprates and Nickelates

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dc.creatorParimi, P. V.
dc.creatorHakim, N.
dc.creatorChou, F. C.
dc.creatorCheong, S. W.
dc.creatorSridhar, S.
dc.date2001-08-21
dc.date.accessioned2026-07-07T02:42:29Z
dc.date.available2026-07-07T02:42:29Z
dc.descriptionNew dielectric transitions are observed at common temperatures 32K and 245K, in isostructural $La_{2}CuO_{4+x}$ and $La_{5/3}Sr_{1/3}NiO_{4},$ that are signatures of local lattice (octahedral) instabilities. The present dielectric transitions reveal new aspects of the phase diagram of the perovskite cuprates and nickelates. They suggest that competition and coexistence of superconductivity with dielectricity occurs that is analogous to that between superconductivity and anti-ferromagnetism. These results also indicate that inhomogeneous electronic states, such as charge stripes and oxygen ordering, are strongly connected to underlying lattice instabilities.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0108342
dc.identifierhttp://arxiv.org/abs/cond-mat/0108342
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18160
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleDielectric signatures of lattice instabilities at 32K and 245K in $La_{2-y}Sr_{y}MO_{4+x}$ (M=Cu,Ni) Cuprates and Nickelates
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