Title

Anharmonic Thermal Motion in the 93-K Superconductor Ba2YCu3O7 Using Multiple-Wavelength X-Ray Diffraction

Document Type

Article

Publication Date

1-1-1988

Abstract

We have obtained anisotropic thermal parameters for Ba2YCu3O7 from a dual-wavelength x-ray crystal structure determination on a single crystal with a small amount of twinning. Anharmonic thermal motion was found for both Ba and Cu atoms with the largest anharmonic feature attributed to a Ba-Ba breathing mode. The anisotropic and anharmonic thermal parameters are consistent with the coordination polyhedra as well as the bonding distances involved.

DOI

10.1103/PhysRevB.38.874

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