Anharmonic thermal motion in the 93-K superconductor Ba2YCu3O7 using multiple-wavelength x-ray diffraction
P. Marsh, T. Siegrist, R. M. Fleming, L. F. Schneemeyer, J. V. Waszczak
DOI 10.1103/PhysRevB.38.874 · Physical Review B
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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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba2YCu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | unknown |
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