Pressure-induced metallization and amorphization in VO2(A) nanorods

被引：23

作者：

Cheng, Benyuan ^{[1
,2
]}

Li, Quanjun ^{[1
]}

Zhang, Huafang ^{[1
]}

Liu, Ran ^{[1
]}

Liu, Bo ^{[1
]}

Yao, Zhen ^{[1
]}

Cui, Tian ^{[1
]}

Liu, Jing ^{[3
]}

Liu, Zhenxian ^{[4
]}

Sundqvist, Bertil ^{[1
,5
]}

Liu, Bingbing ^{[1
]}

机构：

[1] Jilin Univ, State Key Lab Superhard Mat, Changchun 130012, Peoples R China

[2] China Acad Engn Phys, Mianyang 621900, Sichuan, Peoples R China

[3] Chinese Acad Sci, Beijing Synchrotron Radiat Facil, Inst High Energy Phys, Beijing 100049, Peoples R China

[4] Carnegie Inst Sci, U2A Beam Line, Upton, NY 11973 USA

[5] Umea Univ, Dept Phys, S-90187 Umea, Sweden

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 18期

关键词：

AMORPHOUS TRANSITION; CRYSTAL; PHASE; TRANSFORMATION; SNI4;

D O I：

10.1103/PhysRevB.93.184109

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 similar to 28 GPa should be interpreted as a distinct metastable state, while increasing pressure to similar 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.

引用

页数：5

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