English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Zn(CN)2 is known to have an isotropic negative thermal expansion (NTE)coefficient (about -51 x 10-6 K-1) over 10-370 K that is twice as large as thatof ZrW2O8. We have measured the pressure dependence of the phonon spectra up to30 meV from a polycrystalline sample of Zn(CN)2 at pressures of 0, 0.3, 1.9 and2.8 kbar at temperatures of 165 and 225 K. The measurements enabled us toestimate the energy dependence of the ratios Gamma/B (Gamma are Gruneisenparameters as a function of phonon energy Ei at ambient pressure and B is thebulk modulus), which reflect the anharmonicity of phonons. We conclude that thephonon modes of low energy below 15 meV play an important role in theunderstanding of the NTE behavior in Zn(CN)2 and the measured anharmonicity canquantitatively explain the NTE.

Measurement of anharmonicity of phonons in negative thermal expansion compound Zn(CN)2 by high pressure inelastic neutron scattering