We investigate quanturn transport of carriers through a strained region on monolayer phosphorene theoretically. The electron tunneling is forbidden when the incident angle exceeds a critical value. The critical angles...We investigate quanturn transport of carriers through a strained region on monolayer phosphorene theoretically. The electron tunneling is forbidden when the incident angle exceeds a critical value. The critical angles for electrons tunneling through a strain region for different strengths and directions of the strains are different. Owing to the anisotropic effective masses, the conductance shows a strong anisotropic behavior. By tuning the Fermi energy and strain, the channels can be transited from opaque to transparent, which provides us with an efiqcient way to control the transport of monolayer phosphorene-based microstruetures.展开更多
We investigate theoretically quantum transport through a single barrier on monolayer MoS2. It is found that the transmission properties of spin-up （down） electrons in the K valley are the same as spin-down （up） el...We investigate theoretically quantum transport through a single barrier on monolayer MoS2. It is found that the transmission properties of spin-up （down） electrons in the K valley are the same as spin-down （up） electrons in the K＇ valley due to the time-reversal symmetry. Generally, the transmission probability for transport through an n-n-n （or p p-p） junction is an oscillating function of incident angle, barrier height, as well as the incident energy of electrons. The present transmission shows a directional-dependent tunneling depending sensitively on the spin orientation for transport through a p-p p junction. While for transport through an n-p-n junction, monolayers of MoS2 become opaque for almost all angles of incident Oo except for θ0-θ0m （the resonant angles）. The positions and numbers of resonant peaks in the transmission are determined by the distance between the two barriers and the spin orientation. The conductance in such systems can be tuned significantly by changing the height of the electric potential.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 11374002the Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Provincethe Construct Program of the Key Discipline in Hunan Province
文摘We investigate quanturn transport of carriers through a strained region on monolayer phosphorene theoretically. The electron tunneling is forbidden when the incident angle exceeds a critical value. The critical angles for electrons tunneling through a strain region for different strengths and directions of the strains are different. Owing to the anisotropic effective masses, the conductance shows a strong anisotropic behavior. By tuning the Fermi energy and strain, the channels can be transited from opaque to transparent, which provides us with an efiqcient way to control the transport of monolayer phosphorene-based microstruetures.
基金Supported by the National Natural Science Foundation of China under Grant No 11374002the Hunan Provincial Natural Science Foundation of China under Grant No 13JJ2026+2 种基金the Scientific Research Fund of Hunan Provincial Education Department under Grant No 12B010the Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Provincethe Construct Program of the Key Discipline in Hunan Province
文摘We investigate theoretically quantum transport through a single barrier on monolayer MoS2. It is found that the transmission properties of spin-up （down） electrons in the K valley are the same as spin-down （up） electrons in the K＇ valley due to the time-reversal symmetry. Generally, the transmission probability for transport through an n-n-n （or p p-p） junction is an oscillating function of incident angle, barrier height, as well as the incident energy of electrons. The present transmission shows a directional-dependent tunneling depending sensitively on the spin orientation for transport through a p-p p junction. While for transport through an n-p-n junction, monolayers of MoS2 become opaque for almost all angles of incident Oo except for θ0-θ0m （the resonant angles）. The positions and numbers of resonant peaks in the transmission are determined by the distance between the two barriers and the spin orientation. The conductance in such systems can be tuned significantly by changing the height of the electric potential.
