Signature of symmetry of laterally coupled quantum dots in far-infrared spectrum

doi:10.1088/1674-1056/21/2/027301

中国物理B ›› 2012, Vol. 21 ›› Issue (2): 27301-027301.doi: 10.1088/1674-1056/21/2/027301

谷利英¹,李艳芳¹ ²,楚卫东²,卫英慧¹

收稿日期:2011-03-31 修回日期:2011-06-21 出版日期:2012-01-30 发布日期:2012-01-30
通讯作者: 李艳芳,liyf1230@sohu.com E-mail:liyf1230@sohu.com

Signature of symmetry of laterally coupled quantum dots in far-infrared spectrum

Gu Li-Ying(谷利英)^a), Li Yan-Fang(李艳芳)^a)b)†, Chu Wei-Dong(楚卫东)^b), and Wei Ying-Hui(卫英慧)^a)

a. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
b. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

Received:2011-03-31 Revised:2011-06-21 Online:2012-01-30 Published:2012-01-30
Contact: Li Yan-Fang,liyf1230@sohu.com E-mail:liyf1230@sohu.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11074025), the National Basic Research Program of China (Grant No. 2011CB922200), and a grant from the China Academy of Engineering Physics.

摘要/Abstract

Abstract: We study the effect of structure asymmetry on the energy spectrum and the far-infrared spectrum (FIR) of a lateral coupled quantum dot. The calculated spectrum shows that the parity break of coupled quantum dot results in more coherent superpositions in the low-lying states and exhibits unique anti-crossing in the two-electron FIR spectrum modulated by a magnetic field. We also find that the Coulomb correlation effect can make the FIR spectrum of coupled quantum dot without strict parity deviate greatly from Kohn theorem, which is just contrary to the symmetric case. Our results therefore suggest that FIR spectrum may be used to determine the symmetry of coupled quantum dot and to evaluate the degree of Coulomb interaction.

Key words: structure symmetry, far-infrared spectrum, coupled quantum dot, Coulomb interaction

中图分类号: (Quantum dots)

73.21.La

75.75.-c (Magnetic properties of nanostructures) 78.40.Fy (Semiconductors)

谷利英, 李艳芳, 楚卫东, 卫英慧. [J]. 中国物理B, 2012, 21(2): 27301-027301.

Gu Li-Ying(谷利英), Li Yan-Fang(李艳芳), Chu Wei-Dong(楚卫东), and Wei Ying-Hui(卫英慧) . Signature of symmetry of laterally coupled quantum dots in far-infrared spectrum[J]. Chin. Phys. B, 2012, 21(2): 27301-027301.

参考文献 12

[1]	Petta J R, Johnson A C, Taylor J M, Laird E A, Yacoby A, Lukin M D, Marcus C M, Hanson M P and Gossard A C 2005 Science 309 2180
[2]	Robledo L, Elzerman J, Jundt G, Atat黵e M, Höele A, Fält S and Imamoglu A 2008 Science 320 772
[3]	Petta J R, Lu H and Gossard A C 2010 Science 327 669
[4]	Stinaff E A, Scheibner M, Bracker A S, Ponomarev I V, Korenev V L, Ware M E, Doty M F, Reinecke T L and Gammon D 2006 it Science 311 636
[5]	Payette C, Yu G, Gupta J A, Austing D G, Nair S V, Partoens B, Amaha S and Tarucha S 2009 Phys. Rev. Lett. bf 102 026808
[6]	Krenner H J, Sabathil M, Clark E C, Kress A, Schuh D, Bichler M, Abstreiter G and Finley J J 2005 Phys. Rev. Lett. 94 057402
[7]	Ellenberger C, Ihn T, Yannouleas C, Landman U, Ensslin K, Driscoll D and Gossard A C 2006 Phys. Rev. Lett. bf 96 126806
[8]	Hennessy K, Badolato A, Winger M, Gerace D, Atatüre M, Gulde S, Fält S, Hu E L and Imamouglu A 2007 Nature (London) 445 896
[9]	Zhu J L, Chu W D, Dai Z S and Xu D 2005 Phys. Rev. B 72 165346 bibitem 10 Wendler L, Fomin V M, Chaplik A V and Govorov A O 1996 Phys. Rev. B 54 4794
[11]	Maksym P A and Chakraborty T 1990 Phys. Rev. Lett. 65 108
[12]	Marlo M, Harju A and Nieminen R M 2003 Phys. Rev. Lett. 91 187401

[1]	Rui Li(李睿) and Hang Zhang(张航). Electrical manipulation of a hole ‘spin’-orbit qubit in nanowire quantum dot: The nontrivial magnetic field effects[J]. 中国物理B, 2023, 32(3): 30308-030308.
[2]	Yi-Ming Duan(段一名) and Xue-Chao Li(李学超). Nonlinear optical rectification of GaAs/Ga_1-xAl_xAs quantum dots with Hulthén plus Hellmann confining potential[J]. 中国物理B, 2023, 32(1): 17303-017303.
[3]	Yi-Ming Liu(刘一铭) and Jian-Hua Wei(魏建华). Large Seebeck coefficient resulting from chiral interactions in triangular triple quantum dots[J]. 中国物理B, 2022, 31(9): 97201-097201.
[4]	Zhengzhong Zhang(张正中), Min Yu(余敏), Rui Bo(薄锐), Chao Wang(王超), and Hao Liu(刘昊). Pure spin-current diode based on interacting quantum dot tunneling junction[J]. 中国物理B, 2021, 30(11): 117305-117305.
[5]	Shu-Dong Wu(吴曙东). Anisotropic exciton Stark shift in hemispherical quantum dots[J]. 中国物理B, 2021, 30(5): 53201-053201.
[6]	. [J]. 中国物理B, 2021, 30(4): 40303-.
[7]	. [J]. 中国物理B, 2021, 30(4): 44204-.
[8]	李硕, 石磊, 闫祖威. Optical properties of core/shell spherical quantum dots[J]. 中国物理B, 2020, 29(9): 97802-097802.
[9]	李学超, 叶纯宝, 高娟, 王兵. Optical absorption in asymmetrical Gaussian potential quantum dot under the application of an electric field[J]. 中国物理B, 2020, 29(8): 87302-087302.
[10]	刘佳, 李科曼, 迟锋, 付振国, 侯跃飞, 王志刚, 张平. Probing the Majorana bound states in a hybrid nanowire double-quantum-dot system by scanning tunneling microscopy[J]. 中国物理B, 2020, 29(7): 77302-077302.
[11]	孙复莉, 李振华, 魏建华. Zero-energy modes in serially coupled double quantum dots[J]. 中国物理B, 2020, 29(6): 67302-067302.
[12]	迟锋, 付振国, 刘黎明, 张平. Enhanced spin-dependent thermopower in a double-quantum-dot sandwiched between two-dimensional electron gases[J]. 中国物理B, 2019, 28(10): 107305-107305.
[13]	朱日佳, 黄雨青, 李佳玉, 康宁, 徐洪起. Magnetotransport properties of graphene layers decorated with colloid quantum dots[J]. 中国物理B, 2019, 28(6): 67201-067201.
[14]	刘妮, 李淑鑫, 叶迎春, 姚延立. Enhanced performance of a solar cell based on a layer-by-layer self-assembled luminescence down-shifting layer of core-shell quantum dots[J]. 中国物理B, 2018, 27(12): 127303-127303.
[15]	马奔, 魏思航, 陈泽升, 尚向军, 倪海桥, 牛智川. Quantum frequency down-conversion of single photons at 1552 nm from single InAs quantum dot[J]. 中国物理B, 2018, 27(9): 97802-097802.

Signature of symmetry of laterally coupled quantum dots in far-infrared spectrum

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献 12

相关文章 15

Metrics

本文评价

推荐阅读 0