Rashba electron transport in one-dimensional quantum waveguides

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	Rashba electron transport in one-dimensional quantum waveguides
	Liu DY (Liu DuanYang) ; Xia JB (Xia JianBai) ; Chang YC (Chang YiaChung)
刊名	science china-physics mechanics & astronomy, 53 (1): 16-23 jan 2010
	2010
卷号	53 期号:1 页码:16-23
关键词	Rashba wave function one-dimensional waveguide boundary condition MESOSCOPIC STRUCTURES
通讯作者	xia, jb, inst semicond, state key lab superlattices & microstruct, beijing 100083, peoples r china. 电子邮箱地址: xiajb@red.semi.ac.cn
合作状况	其它
英文摘要	the properties of rashba wave function in the planar one-dimensional waveguide are studied, and the following results are obtained. due to the rashba effect, the plane waves of electron with the energy e divide into two kinds of waves with the wave vectors k(1)=k(0)+k(delta) and k(2)=k(0)-k(delta), where k(delta) is proportional to the rashba coefficient, and their spin orientations are +pi/2 (spin up) and -pi/2 (spin down) with respect to the circuit, respectively. if there is gate or ferromagnetic contact in the circuit, the rashba wave function becomes standing wave form exp(+/- ik(delta)l)sin[k(0)(l-l)], where l is the position coordinate of the gate or contact. unlike the electron without considering the spin, the phase of the rashba plane or standing wave function depends on the direction angle theta of the circuit. the travel velocity of the rashba waves with the wave vector k(1) or k(2) are the same hk(0)/m*. the boundary conditions of the rashba wave functions at the intersection of circuits are given from the continuity of wave functions and the conservation of current density. using the boundary conditions of rashba wave functions we study the transmission and reflection probabilities of rashba electron moving in several structures, and find the interference effects of the two rashba waves with different wave vectors caused by ferromagnetic contact or the gate. lastly we derive the general theory of multiple branches structure. the theory can be used to design various spin polarized devices.; submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-04-26t16:21:35z no. of bitstreams: 1 rashba electron transport in one-dimensional quantum waveguides.pdf: 712627 bytes, checksum: d4a4fea9ff619d976be867f55949c168 (md5); approved for entry into archive by 阎军(yanj@red.semi.ac.cn) on 2010-04-26t16:26:12z (gmt) no. of bitstreams: 1 rashba electron transport in one-dimensional quantum waveguides.pdf: 712627 bytes, checksum: d4a4fea9ff619d976be867f55949c168 (md5); made available in dspace on 2010-04-26t16:26:12z (gmt). no. of bitstreams: 1 rashba electron transport in one-dimensional quantum waveguides.pdf: 712627 bytes, checksum: d4a4fea9ff619d976be867f55949c168 (md5) previous issue date: 2010; 其它
学科主题	半导体物理
收录类别	SCI
语种	英语
公开日期	2010-04-26 ; 2010-10-15
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/11199]
专题	半导体研究所_半导体超晶格国家重点实验室
推荐引用方式 GB/T 7714	Liu DY ,Xia JB ,Chang YC . Rashba electron transport in one-dimensional quantum waveguides[J]. science china-physics mechanics & astronomy, 53 (1): 16-23 jan 2010,2010,53(1):16-23.
APA	Liu DY ,Xia JB ,&Chang YC .(2010).Rashba electron transport in one-dimensional quantum waveguides.science china-physics mechanics & astronomy, 53 (1): 16-23 jan 2010,53(1),16-23.
MLA	Liu DY ,et al."Rashba electron transport in one-dimensional quantum waveguides".science china-physics mechanics & astronomy, 53 (1): 16-23 jan 2010 53.1(2010):16-23.