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

The caged compound LaRu2Zn20 exhibits a structural transition at TS =150 K,whose driving mechanism remains elusive. We have investigated atomic dynamicsby the measurements of specific heat C and inelastic X-ray scattering (IXS).The lattice part of the specific heat Clat divided by T3, Clat/T3, shows abroad peak at around 15 K, which is reproduced by two Einstein modes withcharacteristic temperatures of 35 K and 82 K, respectively. IXS measurementsalong the [111] and [110] directions reveal optical phonon modes at 3 meV (35K) and 7 meV (80 K), respectively, whose values agree with the values ofEinstein temperatures. The first principles calculation has assigned the phononmodes at 3 meV as the optical modes of Zn atoms located at the middle of two Laatoms. The low-energy vibration of the Zn atom perpendicular to the there-foldaxis is thought to lead the structural instability of LaRu2Zn20.

Low-Energy Optical Phonon Modes in the Caged Compound LaRu2Zn20