Jahn-Teller Impurity States in LaSrCuO: XAFS Evidence and Implications for High Tc Superconductivity

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dc.creatorPolinger, V.
dc.creatorHaskel, D.
dc.creatorStern, E. A.
dc.date1998-12-01
dc.date.accessioned2026-07-25T16:14:44Z
dc.descriptionPolarized XAFS measurements on powder of LaSrCuO with aligned c-axes find that apical oxygens neighboring only the Sr dopants have a double-site distribution. This result requires that the doped holes reside in impurity states peaked on the CuO6 octahedron neighboring the dopant (denoted as Sr-octahedrons). A model of the double site is presented of two co-existing spin differentiated (singlet and triplet) Jahn-Teller (JT) distortions of the Sr-octahedrons induced by an extrinsic doped hole pairing with the intrinsic hole. It is speculated that Bose-condensation of the singlet pairs, bound by more than 0.1 eV, produces superconductivity.
dc.description2 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/9811425
dc.identifierhttp://arxiv.org/abs/cond-mat/9811425
dc.identifier.urihttps://dspace.dare.co.zw/handle/123456789/40036
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleJahn-Teller Impurity States in LaSrCuO: XAFS Evidence and Implications for High Tc Superconductivity
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