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arXiv 2005.14329cond-mat.str-elcond-mat.mtrl-sci
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强关联量子阱SrVO $_3$超晶格中量子限制诱导的金属-绝缘体相变

Quantum Confinement Induced Metal-Insulator Transition in Strongly Correlated Quantum Wells of SrVO$_3$ Superlattice

A. D. N. James, M. Aichhorn, J. Laverock

摘要:

采用动力学平均场论(DMFT)和密度泛函理论(DFT+DMFT)研究了强关联$3d$电子在量子限制下的金属-绝缘体跃迁(MIT).我们揭示了新的光的微观机制的MIT和先前报道的异常子带质量增强,这两者都出现作为一个直接后果的V $xz(yz)$状态的量化SrVO $_3$层。因此,我们表明,量子限制可以灵敏地调整电子相关的强度,从而将这种方法应用于其他相关材料。

英文摘要:

Dynamical mean-field theory (DMFT) has been employed in conjunction with density functional theory (DFT+DMFT) to investigate the metal-insulator transition (MIT) of strongly correlated $3d$ electrons due to quantum confinement. We shed new light on the microscopic mechanism of the MIT and previously reported anomalous subband mass enhancement, both of which arise as a direct consequence of the quantization of V $xz(yz)$ states in the SrVO$_3$ layers. We therefore show that quantum confinement can sensitively tune the strength of electron correlations, leading the way to applying such approaches in other correlated materials.

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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