Тип публикации: статья из журнала
Год издания: 2024
Идентификатор DOI: 10.1002/anie.202318401
Аннотация: <jats:title>Abstract</jats:title><jats:p>Zero area compressibility (ZAC) is an extremely rare mechanical response that exhibits an invariant two-dimensional size under hydrostatic pressure. All known ZAC materials are constructed from units in two dimensions as a whole. Here, we propose another strategy to obtain the ZAC by microscПоказать полностьюopically orthogonal-braiding one-dimensional zero compressibility strips. Accordingly, ZAC is identified in a copper-based compound with a planar [CuO<jats:sub>4</jats:sub>] unit, Cu<jats:sub>2</jats:sub>GeO<jats:sub>4</jats:sub>, that possesses an area compressibility as low as 1.58(26) TPa<jats:sup>−1</jats:sup> over a wide pressure range from ≈0 GPa to 21.22 GPa. Based on our structural analysis, the subtle counterbalance between the shrinkage of [CuO<jats:sub>4</jats:sub>] and the expansion effect from the increase in the [CuO<jats:sub>4</jats:sub>]-[CuO<jats:sub>4</jats:sub>] dihedral angle attributes to the ZAC response. High-pressure Raman spectroscopy, in combination with first-principles calculations, shows that the electron transfer from in-plane bonding d<jats:sub>x</jats:sub><jats:sup>2</jats:sup><jats:sub>-y</jats:sub><jats:sup>2</jats:sup> to out-of-plane nonbonding d<jats:sub>z</jats:sub><jats:sup>2</jats:sup> orbitals within copper atoms causes the counterintuitive extension of the [CuO<jats:sub>4</jats:sub>]-[CuO<jats:sub>4</jats:sub>] dihedral angle under pressure. Our study provides an understanding on the pressure-induced structural evolution of copper-based oxides at an electronic level and facilitates a new avenue for the exploration of high-dimensional anomalous mechanical materials.</jats:p>
Журнал: Angewandte Chemie International Edition
Выпуск журнала: Т. 63, № 7
ISSN журнала: 14337851
Издатель: Wiley Interscience