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Durham University

Department of Physics

Staff profile

Publication details for Professor Tom Lancaster

Zhang, R.H., Abbett, B.M., Read, G., Lang, F., Lancaster, T., Tran, T.T., Halasyarnani, P.S., Blundell, S.J., Benedek, N.A. & Hayward, M.A. (2016). La2SrCr2O7: Controlling the Tilting Distortions of n=2 Ruddlesden-Popper Phases through A-Site Cation Order. Inorganic Chemistry 55(17): 8951-8960.

Author(s) from Durham


The n = 2 Ruddlesden−Popper phase La2SrCr2O7 adopts a highly unusual structural configuration in which the cooperative rotations of the CrO6 octahedra are out of phase in all three Cartesian directions (ΦΦΦz/ΦΦΦz; a−a−c−/a−a−c−). First-principles DFT calculations indicate that this unusual structural arrangement can be attributed to coupling between the La/Sr A-site distribution and the rotations of the CrO6 units, which combine to relieve the local deformations of the chromium−oxygen octahedra.