arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1007.4624cond-mat.mtrl-sci
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VO2新的本征性质的观察

Observation of new intrinsic properties of VO2

Bongjin Simon Mun, Kai Chen, Youngchul Leem, Catherine Dejoie, Nobumichi Tamura, Martin Kunz, Zhi Liu, Michael E. Grass, Changwoo Park, Y. Yvette Lee, Honglyoul Ju

摘要:

单晶VO 2在67.2 ℃时出现一阶金属-绝缘体转变(MIT),在~49.7 ℃时出现绝缘体-绝缘体转变(IIT)。从同步辐射X射线衍射分析,IIT显示单斜M2到M1相的结构相变(SPT),而MIT显示M1到金红石R相。IIT表现出明显的SPT,而MIT表现出< 0.02 ℃的突变宽度,支持Mott的预测。MIT的发生与R相和M1相之间的尖锐的边界非相干。MIT起始温度显示出显著的变化。

英文摘要:

The single crystal VO2, exihibiting a first-order metal-insulator transition (MIT) at 67.2 degrees C and an insulator-insulator transition (IIT) at ~49.7 degrees C, is grown. From synchrotron-based x-ray microdiffraction analysis, the IIT shows structural phase transition (SPT) of monoclinic M2 to M1 phases while the MIT displays M1 to rutile R phases. The IIT exhibits percolative SPT while the MIT shows abrupt transition width of < 0.02 degrees C, supporting Mott's prediction. The MIT occurs non-percolatively with a sharp boundary between R and M1 phases. The MIT onset temperature shows significant variation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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