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Asymmetric hydrogenation-induced ferromagnetism in stanene nanoribbons considering electric field and strain effects

Author:
Xiong, Wenqi, Xia, Congxin, Du, Juan, Wang, Tianxing, Jia, Yu
Source:
Journal of materials science 2018 v.53 no.1 pp. 657-666
ISSN:
0022-2461
Subject:
ambient temperature, electric field, magnetism, phase transition, semiconductors
Abstract:
As a rising topic, room-temperature ferromagnetic (FM) semiconductors can gain novel and desired properties in spintronics. Here, we propose an asymmetric hydrogenated zigzag stanene nanoribbons (ZSnNRs), named as H₁–ZSnNRs–H₂, considering the spin–orbit coupling effects. The H₁–ZSnNRs–H₂ is energetic favorably and has the room-temperature FM ground states. Interestingly, benefiting from the modulation of electric field, the band gaps of H₁–ZSnNRs–H₂ monotonously decrease, inducing a phase transition from semiconductor to metal. Moreover, the compressive strain can significantly achieve an indirect–direct band gap transition and the formation of half semiconductor. These results not only open up an opportunity to realize the room-temperature FM semiconductor, but also predicate its tunable electronic properties of the ZSnNRs.
Agid:
5834255