Huge Rashba-type spin–orbit coupling in binary hexagonal PX nanosheets (X = As, Sb, and Bi)

文献情報

出版日 2018-10-22

DOI 10.1039/C8CP05426F

インパクトファクター 3.676

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要旨

We theoretically propose that Rashba-type band splitting can be achieved in binary alloyed hexagonal PX nanosheets (X = As, Sb, and Bi). The lack of inversion symmetry results in an effective electric field perpendicular to the basal plane of PX, hence, leading to Rashba-type spin–orbit coupling (SOC) in the two dimensional PX nanosheets. Since the SOC strength roughly scales quadratically with atomic number, the largest band splitting is found in PBi with a Rashba coefficient of ∼1.56 eV Å, which is a huge value among two-dimensional materials. Furthermore, tensile biaxial strain can be employed to significantly enhance the strength of SOC, for instance, a Rashba coefficient of 4.41 eV Å can be realized at a strain of 10%. The huge and strain-tunable Rashba-type SOC of PBi suggests that it holds great promise for spintronic applications.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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