Spin-dependent transport for a two-dimensional electron gas with magnetic barriers

doi:10.1088/1674-1056/19/3/037301

Abstract The spin-dependent conductance and magnetoresistance ratio (MRR) for a semiconductor heterostructures consisting of two magnetic barriers with different height and space have been investigated by the transfer-matrix method. It is shown that the splitting of the conductance for parallel and antiparallel magnetization configurations results in tremendous spin-dependent MRR, and the maximal MRRs reach 5300\% and 3800\% for the magnetic barrier spaces W = 81.3 and 243.9 nm, respectively. The obtained spin-filtering transport property of nanostructures with magnetic barriers may be useful to magnetic-barrier-based spintronics.

Keywords: semiconductor 2DEG magnetic barriers spin-dependent transport

Received: 23 May 2009
Revised: 10 September 2009
Accepted manuscript online:

PACS:	72.25.Dc	(Spin polarized transport in semiconductors)
	72.25.Mk	(Spin transport through interfaces)
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)
	72.20.My	(Galvanomagnetic and other magnetotransport effects)
	73.63.-b	(Electronic transport in nanoscale materials and structures)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos.~10574042 and 10974052), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No.~20060542002).

Cite this article:

Wang Hai-Yan(王海艳), Duan Zi-Gang(段子刚), Liao Wen-Hu(廖文虎), and Zhou Guang-Hui(周光辉) Spin-dependent transport for a two-dimensional electron gas with magnetic barriers 2010 Chin. Phys. B 19 037301

[1]	Baibich M N, Broto J M, Fert A, van Dau F N, Petroff F,Etienne P, CrenZet G, Friederich A and Chazelas J 1988 Phys. Rev.Lett. 61 2472
[2]	Matulis A, Peeters F M and Vasilopoulos P 1994 Phys. Rev. Lett. 72 1518
[3]	Guo Y, Wang H and Gu B L 2000 Phys. Rev. B 61 1728
[4]	Vancura T, Ihn T, Broderick S and Ensslin K 2000 Phys. Rev. B62 5074
[5]	Zhao H, Liao W H and Zhou G H 2007 Chin. Phys. 16 1748
[6]	Chen M L and Wang S J 2007 Chin. Phys. 16 2096
[7]	Xia P Y and Ze C 2006 Commun. Theor. Phys. 46 348
[8]	Ramos A C A, Farias G A, Costa Filho R N and Almeida N S2007 arXiv: cond-mat/0703763v1
[9]	Zhai F, Guo Y and Gu B L 2002 Phys. Rev. B66 125305
[10]	Yang X D, Wang R Z, Guo Y, Yang W, Yu D B and Yan H2004 Phys. Rev. B 70115303
[11]	Casper F and Felser C 2008 Solid State Commun. 148 175
[12]	Beletskii N N, Berman G P, Bishop A R and Yakovenko V M 2007Phys. Rev. B 75 174418
[13]	Guo Y, Gu B L, Zeng Z, Yu J Z and Kawazoe Y 2000 Phys.Rev. B 62 2635
[14]	Lu M W, Zhang L D and Yan X H 2002 Phys. Rev. B 66 224412
[15]	Bao Y J and Shen S Q 2007 Phys. Rev. B 76 045313
[16]	Ngo A T, Villas-B$\hat o $as J M and Ulloal S E 2008Phys. Rev. B 78 245310
[17]	Honda S, Itoh H, Inoue J, Kurebayashi H, Trypiniotis T,Barnes C H W, Hirohata A and Bland J A C 2008 Phys. Rev. B 78245316
[18]	Pershin Y V and Diventra M 2008 Phys. Rev. B 78113309
[19]	Majumdar A 1996 Phys. Rev. B 54 11911
[20]	Ibrahim I S and Peeters F M 1995 Phys. Rev. B 5217321
[21]	Papp G and Peeters F M 2001 Appl. Phys. Lett. 782184
[21a]	Xu H Z and Okada Y 2001 Appl. Phys. Lett. 79 3119
[22]	Landauer R 1970 Phil. Mag. 21 863
[22a]	Büttiker M 1986 Phys. Rev. Lett. 57 1761
[23]	Schep K M, Kelly P J and Bauer G E W 1998 Phys. Rev. B57 8907

[1]	Current spin polarization of a platform molecule with compression effect Zhi Yang(羊志), Feng Sun(孙峰), Deng-Hui Chen(陈登辉), Zi-Qun Wang(王子群), Chuan-Kui Wang(王传奎), Zong-Liang Li(李宗良), and Shuai Qiu(邱帅). Chin. Phys. B, 2022, 31(7): 077202.
[2]	Theoretical design of thermal spin molecular logic gates by using a combinational molecular junction Yi Guo(郭逸), Peng Zhao(赵朋), and Gang Chen(陈刚). Chin. Phys. B, 2022, 31(4): 047202.
[3]	Designing of spin filter devices based on zigzag zinc oxide nanoribbon modified by edge defect Bao-Rui Huang(黄保瑞), Fu-Chun Zhang(张富春), Yan-Ning Yang(杨延宁), Zhi-Yong Zhang(张志勇), Wei-Guo Wang(王卫国). Chin. Phys. B, 2019, 28(10): 108503.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Metrics
Related Articles

Spin-dependent transport for a two-dimensional electron gas with magnetic barriers

Cite this article:

Online attention