Open AccessPressure-induced cation-cation bonding inV 2 O 3
Author(s) -
Ligang Bai,
Li Na Quan,
Serena A. Corr,
Michael Pravica,
Changfeng Chen,
Yusheng Zhao,
Stanislav V. Sinogeikin,
Yue Meng,
Changyong Park,
Guoyin Shen
Publication year - 2015
Publication title -
physical review. b, condensed matter and materials physics
Language(s) - English
Resource type - Journals
eISSN - 1538-4489
pISSN - 1098-0121
DOI - 10.1103/physrevb.92.134106
Subject(s) - monoclinic crystal system , crystallography , dimer , materials science , ab initio , phase transition , diamond anvil cell , crystal structure , high pressure , physics , chemistry , thermodynamics , nuclear magnetic resonance , quantum mechanics
A pressure-induced phase transition, associated with the formation of cation-cation bonding, occurs in V2O3 by combining synchrotron x-ray diffraction in a diamond anvil cell and ab initio evolutionary calculations. The high-pressure phase has a monoclinic structure with a C2/c space group, and it is both energetically and dynamically stable at pressures above 47 GPa to at least 105 GPa. This phase transition can be viewed as a two-dimensional Peierls-like distortion, where the cation-cation dimer chains are connected along the c axis of the monoclinic cell. This finding provides insights into the interplay of electron correlation and lattice distortion in V2O3, and it may also help to understand novel properties of other early transition-metal oxides