量子点接触中有关电导0.7结构的研究

焦惠丛; 安兴涛; 刘建军

doi:10.7498/aps.62.017301

摘要

研究了由鞍形势描述的量子点接触中的电子输运性质, 利用Hartree-Fock近似与低维纳米器件中Thomas-Fermi近似方法处理了电子-电子之间的相互作用,采用格点格林函数方法计算了零温下体系的电导、电子的自旋积累以及散粒噪声,重现了0.7结构这个反常的实验现象. 计算结果加深了我们关于半导体纳米器件中的强关联互作用对自旋输运影响的理解.

关键词:

In the paper, we study electronic transport property through a quantum point contact with the saddle-point potential. Our numerical approach is based on the Green's function technique which is evaluated at the Hartree-Fork level. We reproduce relevant features of 0.7 structure when the strength of electron-electron interaction has changed. Besides, we calculate spin accumulation and noise factor at zero temperature. We deepen the understanding of the effect of strong correlation interaction on spin transport in nanometer semiconductor device.

Keywords:

作者及机构信息

1.
河北师范大学物理科学与信息工程学院, 河北省新型薄膜材料实验室, 石家庄 050024;

2.
河北科技大学理学院, 石家庄 050018;

3.
石家庄学院物理系, 石家庄 050035

基金项目: 国家自然科学基金(批准号: 61176089, 11104059)和河北省自然科学基金(批准号: A2011208010)资助的课题．

Authors and contacts

1.
College of Physical Science and Information Engineering, Hebei Normal University, Shijiazhuang 050024, China;

2.
School of Sciences, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China;

3.
Physics Department, Shijiazhuang University, Shijiazhuang 050035, China

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 61176089 11104059), and Hebei Province Natural Science Foundation of China (Grant No. A2011208010).

参考文献

[1]	Yan S S, Gan Z Z 1995 Mesoscopic Physics (Beijing: Beijing University Press) p3 (in Chinese) [阎守胜, 甘子钊 1995 介观物理 (北京: 北京大学出版社)第3页]
[2]	van Wees B J, van Houten H, Beenakker C W J, Williamson J G, Kouwenhoven L P, van der Marel D, Foxon C T 1988 Phys. Rev. Lett. 60 848
[3]	Wharam D A, Thornton T J, Newbury R, Pepper M, Ahmed H, Frost J E F, Hasko D G, Peacock D C, Ritchie D A, Jones G A C 1988 J. Phys. C 21 L209
[4]	Thomas K J, Nicholls J T, Simmons M Y, Pepper M, Mace D R, Ritchie D A 1996 Phys. Rev. Lett. 77 135
[5]	Cornaglla P S, Balseiro C A, Avignon M 2005 Phys. Rev. B 71 024432
[6]	Reilly D J, Buehler T M, O'Brien J L, Hamilton A R, Dzurak A S, Clark R G, Kane B E, Pfeiffer L N, West K W 2002 Phys. Rev. Lett. 89 246801
[7]	Reukky D J, Facer G R, Dzurak A S, Kane B E, Clark R G, Stiles P J, Clark R G, Hamilton A R, O'Brien J L, Lumpkin N E, Pfeiffer L N, West K W 2001 Phys. Rev. B 63 121311
[8]	Rokhinson L P, Pfeiffer L N, West K W 2006 Phys. Rev. Lett. 96 156602
[9]	Lassl A, Schlagneck P, Richter K 2007 Phys. Rev. B 75 045346
[10]	Hsiao J H, Hong T M 2010 Phys. Rev. B 82 115309
[11]	Wan J, Cahay M, Debray P, Newrock R 2009 Phys. Rev. B 80 155440
[12]	Meir Y, Hirose K, Wingreen N S 2002 Phys. Rev. Lett. 89 196802
[13]	Matveev K A 2004 Phys. Rev. Lett. 92 106801
[14]	Liu J J, Zhang J, An X T 2011 J. Beijing Univ. Technol. 37 4 (in Chinese) [刘建军, 张建, 安兴涛 2011 北京工业大学学报 37 4]
[15]	Dicarlo L, Zhang Y, McClure D T, Reilly D J, Marcus C M, Pfeiffer L N, West K W 2006 Phys. Rev. Lett. 97 036810
[16]	Roche P, Ségala J, Glattli D C, Nicholls J T, Pepper M, Graham A C, Thomas K J, Simmons M Y, Ritchie D A 2004 Phys. Rev. Lett. 93 116602
[17]	An X T, Li Y X, Liu J J 2007 Acta Phys. Sin. 56 4105 (in Chinese) [安兴涛, 李玉现, 刘建军 2007 物理学报 56 4105]
[18]	Bttiker M 1990 Phys. Rev. B 41 7906
[19]	Li Y X, Liu J J, Li B Z 2005 Acta Phys. Sin. 54 1366 (in Chinese) [李玉现, 刘建军, 李伯臧 2005 物理学报 54 1366]
[20]	Datta S 1995 Electroninc Transport in Mesoscopic Systems (Cambridge: Cambridge University Press) p307

施引文献

[1]	Yan S S, Gan Z Z 1995 Mesoscopic Physics (Beijing: Beijing University Press) p3 (in Chinese) [阎守胜, 甘子钊 1995 介观物理 (北京: 北京大学出版社)第3页]
[2]	van Wees B J, van Houten H, Beenakker C W J, Williamson J G, Kouwenhoven L P, van der Marel D, Foxon C T 1988 Phys. Rev. Lett. 60 848
[3]	Wharam D A, Thornton T J, Newbury R, Pepper M, Ahmed H, Frost J E F, Hasko D G, Peacock D C, Ritchie D A, Jones G A C 1988 J. Phys. C 21 L209
[4]	Thomas K J, Nicholls J T, Simmons M Y, Pepper M, Mace D R, Ritchie D A 1996 Phys. Rev. Lett. 77 135
[5]	Cornaglla P S, Balseiro C A, Avignon M 2005 Phys. Rev. B 71 024432
[6]	Reilly D J, Buehler T M, O'Brien J L, Hamilton A R, Dzurak A S, Clark R G, Kane B E, Pfeiffer L N, West K W 2002 Phys. Rev. Lett. 89 246801
[7]	Reukky D J, Facer G R, Dzurak A S, Kane B E, Clark R G, Stiles P J, Clark R G, Hamilton A R, O'Brien J L, Lumpkin N E, Pfeiffer L N, West K W 2001 Phys. Rev. B 63 121311
[8]	Rokhinson L P, Pfeiffer L N, West K W 2006 Phys. Rev. Lett. 96 156602
[9]	Lassl A, Schlagneck P, Richter K 2007 Phys. Rev. B 75 045346
[10]	Hsiao J H, Hong T M 2010 Phys. Rev. B 82 115309
[11]	Wan J, Cahay M, Debray P, Newrock R 2009 Phys. Rev. B 80 155440
[12]	Meir Y, Hirose K, Wingreen N S 2002 Phys. Rev. Lett. 89 196802
[13]	Matveev K A 2004 Phys. Rev. Lett. 92 106801
[14]	Liu J J, Zhang J, An X T 2011 J. Beijing Univ. Technol. 37 4 (in Chinese) [刘建军, 张建, 安兴涛 2011 北京工业大学学报 37 4]
[15]	Dicarlo L, Zhang Y, McClure D T, Reilly D J, Marcus C M, Pfeiffer L N, West K W 2006 Phys. Rev. Lett. 97 036810
[16]	Roche P, Ségala J, Glattli D C, Nicholls J T, Pepper M, Graham A C, Thomas K J, Simmons M Y, Ritchie D A 2004 Phys. Rev. Lett. 93 116602
[17]	An X T, Li Y X, Liu J J 2007 Acta Phys. Sin. 56 4105 (in Chinese) [安兴涛, 李玉现, 刘建军 2007 物理学报 56 4105]
[18]	Bttiker M 1990 Phys. Rev. B 41 7906
[19]	Li Y X, Liu J J, Li B Z 2005 Acta Phys. Sin. 54 1366 (in Chinese) [李玉现, 刘建军, 李伯臧 2005 物理学报 54 1366]
[20]	Datta S 1995 Electroninc Transport in Mesoscopic Systems (Cambridge: Cambridge University Press) p307

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