Electric Field Effects on Spin Splitting of Two-Dimensional van der Waals Arsenene/FeCl2 Heterostructures

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• 作者：Yan Song ; Dong Li ; Wenbo Mi ; Xiaocha Wang ; Yingchun Cheng
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：March 17, 2016
• 年：2016
• 卷：120
• 期：10
• 页码：5613-5618
• 全文大小：412K
• ISSN：1932-7455

文摘

We perform an ab initio simulation on the structural and electronic properties of van der Waals monolayer arsenene/FeCl₂ heterostructures. Spin splitting appears at the conduction band minimum of arsenene due to interfacial coupling between As p and Cl p, Fe d states in the spin-down channel. The maximum splitting energy is 123 meV in all stacking configurations. Moreover, the splitting energy can be tuned by a perpendicular electric field. At a field of 5 V/nm, the spin-splitting direction can be inversed, and the splitting energy is −66 meV. Additionally, the positive electric field makes the system turn from an Ohmic contact into a Schottky one, which realizes a continuous modulation on the barrier height. More importantly, the electric control of spin-splitting inversion can be converted into an electric potential difference in arsenene according to the anomalous Hall effect. The transformation from spin-manipulation information to electric signal is useful in spintronic devices.