| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Electric Field Control of Interface Related Spin Splitting in Step Quantum Wells |
| HAO Ya-Fei, CHEN Yong-Hai, HAO Guo-Dong, WANG Zhan-Guo |
| Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, PO Box 912, Beijing 100083 |
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| Cite this article: |
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HAO Ya-Fei, CHEN Yong-Hai, HAO Guo-Dong et al 2009 Chin. Phys. Lett. 26 077104 |
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Abstract Spin splitting of the AlyGa1-yAs/GaAs/AlxGa1-xAs/AlyGa1-yAs (x≠y) step quantum wells (QWs) has been theoretically investigated with a model that includes both the interface and the external electric field contribution. The overall spin splitting is mainly determined by the interface contribution, which can be well manipulated by the external electric field. In the absence of the electric field, the Rashba effect exists due to the internal structure inversion asymmetry (SIA). The electric field can strengthen or suppress the internal SIA, resulting in an increase or decrease of the spin splitting. The step QW, which results in large spin splitting, has advantages in applications to spintronic devices compared with symmetrical and asymmetrical QWs. Due to the special structure design, the spin splitting does not change with the external electric field.
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| Keywords:
71.70.Ej
71.23.An
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Received: 26 September 2008
Published: 02 July 2009
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| PACS: |
71.70.Ej
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(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
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71.23.An
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(Theories and models; localized states)
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[1]Bychkov Yu A and Rashba E I 1984 J. Phys. C 176039
[2] Osaka J, Pfeffer P and Zawadzki W 1999 Phys. Rev. B 60 7736
[3] Shang L Y, Yu G L, Lin T, Zhou W Z, Guo S L, Dai N and ChuJ H 2008 CHIN. PHYS. LETT. 25 2194
[4] Nitta J, Akazaki T, Takayanagi H and Enoki T 1997 Phys. Rev. Lett. 78 1335
[5] Grundler D 2000 Phys. Rev. Lett. 84 6074
[6] Winkler R 2003 Spin-Orbit Coupling Effects inTwo-Dimensional Electron and Hole Systems (Berlin: Springer) chap 6p 77
[7] Zawadzki W and Pfeffer P 2004 Semicond. Sci. Technol 19 R1
[8] Meier L, Salis G, Shorubalko I, Gini E, Sch\"{on S andEnsslin K 2007 Nature 3 650
[9] Jusserand B, Richards D, Allan G, Priester C and Etienne B1995 Phys. Rev. B 51 4707
[10] Pfeffer P and Zawadzki W 1998 Phys. Rev. B 59R5312
[11] Sch\"{apers Th, Engels G, Lange J, Klocke Th, HollfelderM and L\"{uth H 1998 J. Appl. Phys. 83 4324
[12] Sato Y, Kita T, Gozu S and Yamada S 2001 J. Appl.Phys. 89 8017
[13] Andrada e Silva E A de, La Rocca G C and Bassani F 1997 Phys. Rev. B 55 16293
[14] Hasegawa M M and Andrada e Silva E A de 2003 Phys.Rev. B 68 205309
[15] Hao Y F, Chen Y H, Liu Y and Wang Z G 2009 Europhys.Lett. 85 37003
[16] Matsuyama T, K\"{ursten R, Mei{\ssner C and Merkt U2000 Phys. Rev. B 61 15588
[17] Andrada e Silva E A de, La Rocca G C and Bassani F 1994 Phys. Rev. B 50 8523
[18] Yang W and Chang K 2006 Phys. Rev. B 74193314
[19] Engels G, Lange J, Sch\"{apers Th and L\"{uth H 1996 Phys. Rev. B 55 R1958
[20] Datta S and Das B 1989 Appl. Phys. Lett. 56665 |
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