Open AccessPressure-induced metallization and amorphization inV O 2 ( A )
Author(s) -
Benyuan Cheng,
Quanjun Li,
Huafang Zhang,
Ran Liu,
Bo Liu,
Zhen Yao,
Tian Cui,
Jing Liu,
Zhenxian Liu,
Bertil Sundqvist,
Bingbing Liu
Publication year - 2016
Publication title -
physical review. b./physical review. b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.78
H-Index - 465
eISSN - 2469-9969
pISSN - 2469-9950
DOI - 10.1103/physrevb.93.184109
Subject(s) - metastability , delocalized electron , tetragonal crystal system , materials science , crystallography , amorphous solid , phase diagram , metal , condensed matter physics , phase (matter) , physics , crystal structure , chemistry , quantum mechanics , metallurgy
A metallic state enabled by the metal-insulator transition (MIT) in single crystal VO2(A) nanorods is demonstrated, which provides important physical foundation in experimental understanding of MIT in VO2. The observed tetragonal metallic state at ∼28 GPa should be interpreted as a distinct metastable state, while increasing pressure to ∼32 GPa, it transforms into a metallic amorphous state completely. The metallization is due to V 3d orbital electrons delocalization, and the amorphization is attributed to the unique variation of V-O-V bond angle. A metallic amorphous VO2 state is found under pressure, which is beneficial to explore the phase diagram of VO2. Furthermore, this work proves the occurrence of both the metallization and amorphization in octahedrally coordinated materials
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom