Tuning phonon dynamics in the novel anomalous thermal expansion candidates, tertiary mixed-metal cyanides CuxAgyAu1-x-yCN
The group 11 metal cyanides exhibit 1-D negative thermal expansion along the direction of M-CN chains they consist of. We have been exploring the possibility of tuning this property by varying the metal composition and have synthesised for the first time a set of tertiary mixed-metal cyanides with the general formula Cu_xAg_yAu_1-x-yCN. We would like to collect their phonon spectra to study how their dynamics changes with composition, and as a function of temperature. This will be combined with ab initio phonon calculations to establish the influence hetero-metallophilic interactions have, both along the chain and across the metal planes, on the nature and the evolution of phonons.
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D'AMBRUMENIL Stella; CHIPPINDALE Ann Mary; HIBBLE Simon and ZBIRI Mohamed. (2018). Tuning phonon dynamics in the novel anomalous thermal expansion candidates, tertiary mixed-metal cyanides CuxAgyAu1-x-yCN. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-01-471