单斜晶系
相图
四方晶系
正交晶系
钒
静水压力
材料科学
金刚石顶砧
相(物质)
相变
热力学
凝聚态物理
结晶学
化学
晶体结构
高压
冶金
物理
有机化学
作者
Yabin Chen,Shuai Zhang,Feng Ke,Changhyun Ko,Sangwook Lee,Kai Liu,Bin Chen,Joel W. Ager,Raymond Jeanloz,V. Eyert,Junqiao Wu
出处
期刊:Nano Letters
[American Chemical Society]
日期:2017-03-08
卷期号:17 (4): 2512-2516
被引量:65
标识
DOI:10.1021/acs.nanolett.7b00233
摘要
The complexity of strongly correlated electron physics in vanadium dioxide is exemplified as its rich phase diagrams of all kinds, which in turn shed light on the mechanisms behind its various phase transitions. In this work, we map out the hydrostatic pressure - temperature phase diagram of vanadium dioxide nanobeams by independently varying pressure and temperature with a diamond anvil cell. In addition to the well-known insulating M1 (monoclinic) and metallic R (tetragonal) phases, the diagram identifies the existence at high pressures of the insulating M1' (monoclinic, more conductive than M1) phase, and two metallic phases of X (monoclinic) and O (orthorhombic, at high temperature only). Systematic optical and electrical measurements combined with density functional calculations allow us to delineate their phase boundaries as well as reveal some basic features of the transitions.
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