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Understanding the Phase Transition Evolution Mechanism of Partially M2 Phased VO2 Film by Hydrogen Incorporation
The Journal of Physical Chemistry Letters ( IF 5.7 ) Pub Date : 2020-11-02 , DOI: 10.1021/acs.jpclett.0c02592
Dooyong Lee 1, 2 , Taewon Min 1 , Gongin Lee 1 , Jiwoong Kim 1 , Sehwan Song 1 , Jisung Lee 3 , Jong-Seong Bae 4 , Haeyong Kang 1 , Jaekwang Lee 1 , Sungkyun Park 1
Affiliation  

Studies on the hydrogen incorporated M1 phase of VO2 film have been widely reported. However, there are few works on an M2 phase of VO2. Recently, the M2 phase in VO2 has received considerable attention due to the possibility of realizing a Mott transition field-effect transistor. By varying the postannealing environment, systematic variations of the M2 phase in (020)-oriented VO2 films grown on Al2O3(0001) were observed. The M2 phase converted to the metallic M1 phase at first and then to the metallic rutile phase after hydrogen annealing (i.e., for H2/N2 mixture and H2 environments). From the diffraction and spectroscopy measurements, the transition is attributed to suppressed electron interactions, not structural modification caused by hydrogen incorporation. Our results suggest the understanding of the phase transition process of the M2 phase by hydrogen incorporation and the possibility of realization of the M2 phased-based Mott transition field-effect transistor.

中文翻译:

通过氢掺入了解部分M2相VO 2膜的相变演化机理

关于VO 2膜的氢结合M1相的研究已被广泛报道。但是,关于VO 2的M2相的工作很少。近来,由于实现Mott跃迁场效应晶体管的可能性,VO 2中的M2相受到了相当大的关注。通过改变退火后的环境,观察到在Al 2 O 3(0001)上生长的(020)取向VO 2膜中M2相的系统变化。M2相首先转变为金属M1相,然后在氢退火后转变为金属金红石相(即,对于H 2 / N 2混合物和H 2环境)。从衍射和光谱学测量,该转变归因于抑制的电子相互作用,而不是由于氢结合引起的结构修饰。我们的结果表明,通过氢的结合,可以理解M2相的相变过程,以及实现基于M2相的Mott跃迁场效应晶体管的可能性。
更新日期:2020-11-19
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