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arXiv 2107.07899cond-mat.mtrl-sci
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金红石型VO $_{2}$(110)表面及其富氧末端电子和结构性质的第一性原理研究

First principles studies of the electronic and structural properties of the rutile VO$_{2}$(110) surface and its oxygen-rich terminations

Jakub Planer, Florian Mittendorfer, Josef Redinger

摘要:

采用密度泛函理论(DFT)研究了金红石VO $_{2}$(110)表面及其富氧末端的结构和电子性质.我们讨论了各种DFT泛函的性能,包括PBE,PBE+U(U = 2 eV),SCAN和SCAN+rVV泛函与非磁性和铁磁自旋序。我们预测存在的环状终止,这是电子和结构相关的V $_{2}$ O $_{5}$(001)单层,并显示出比纯氧吸附相更高的稳定性。尽管事实上,所计算的相稳定性取决于所选择的功能,我们的研究结果表明,采用自旋极化的扫描功能提供了一个很好的折衷产生的金红石VO $_{2}$体相的结构和电子性质的合理描述和形成的焓为不同阶段的钒氧化。

英文摘要:

We present a Density Functional Theory (DFT) study of the structural and electronic properties of bare rutile VO$_{2}$(110) surfaces and its oxygen-rich terminations. We discuss the performance of various DFT functionals, including PBE, PBE+U (U = 2 eV), SCAN and SCAN+rVV functionals with non-magnetic and ferromagnetic spin ordering. We predict the presence of a ring-like termination that is electronically and structurally related to a V$_{2}$O$_{5}$(001) monolayer and shows a higher stability than pure oxygen adsorption phases. Despite the fact that the calculated phase stabilities depend on the chosen functional, our results show that employing the spin-polarized SCAN functional offers a good compromise yielding both a reasonable description of the structural and electronic properties of the rutile VO$_{2}$ bulk phase and the enthalpy of formation for different stages of vanadium oxidation.

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