Evidence for anisotropic atomic displacements and orbital distribution in the inhomogeneous CuO2 plane of the Bi2Sr2CaCu2O8+δ system. Saini, N., Oyanagi, H., Molle, M., Garg, K. B., Kim, C., & Bianconi, A. Journal of Physics and Chemistry of Solids, 65(8-9):1439–1443, 2004.
Evidence for anisotropic atomic displacements and orbital distribution in the inhomogeneous CuO2 plane of the Bi2Sr2CaCu2O8+δ system [link]Paper  doi  abstract   bibtex   
We have used a combination of the Cu K-edge extended X-ray absorption fine structure (EXAFS), and the Cu L-edge X-ray absorption measurements, with polarization vector parallel to the two orthogonal Cu–O–Cu bonds, to explore the directional instantaneous atomic displacements and the orbital distribution within the heterogeneaous CuO 2 plane of the Bi 2 Sr 2 CaCu 2 O 8+δ (Bi2212) system. The results show an anisotropic Cu–O bond distribution, measured by the EXAFS in the two directions, and reveal large anisotropy of the unoccupied Cu 3d orbitals. The outcome of the present measurements is consistent with the nanoscale heterogeneities with coexisting electronic components.
@article{saini_evidence_2004,
	title = {Evidence for anisotropic atomic displacements and orbital distribution in the inhomogeneous {CuO}2 plane of the {Bi}2Sr2CaCu2O8+δ system},
	volume = {65},
	issn = {00223697},
	url = {http://dx.doi.org/10.1016/j.jpcs.2003.12.011},
	doi = {10.1016/j.jpcs.2003.12.011},
	abstract = {We have used a combination of the Cu K-edge extended X-ray absorption fine structure (EXAFS), and the Cu L-edge X-ray absorption measurements, with polarization vector parallel to the two orthogonal Cu–O–Cu bonds, to explore the directional instantaneous atomic displacements and the orbital distribution within the heterogeneaous CuO 2 plane of the Bi 2 Sr 2 CaCu 2 O 8+δ (Bi2212) system. The results show an anisotropic Cu–O bond distribution, measured by the EXAFS in the two directions, and reveal large anisotropy of the unoccupied Cu 3d orbitals. The outcome of the present measurements is consistent with the nanoscale heterogeneities with coexisting electronic components.},
	number = {8-9},
	journal = {Journal of Physics and Chemistry of Solids},
	author = {Saini, N. and Oyanagi, H. and Molle, M. and Garg, K. B. and Kim, C. and Bianconi, A.},
	year = {2004},
	keywords = {cdw, polaron},
	pages = {1439--1443}
}

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