Please wait a minute...
Chin. Phys. B, 2008, Vol. 17(4): 1383-1388    DOI: 10.1088/1674-1056/17/4/038
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Spin-polarized transport through the T-shaped double quantum dots

Yang Fu-Bin(羊富彬)a)†, Wu Shao-Quan(吴绍全)a), Yan Cong-Hua(闫从华)a),Huang Rui(黄睿)b), Hou Tao(侯涛)a), and Bi Ai-Hua(毕爱华)a)
a College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China; b Southwest Petroleum University, College of Sciences, Nanchong 610500, China
Abstract  Using the Keldysh nonequilibrium Green function and equation-of-motion technique, this paper investigates the spin-polarized transport properties of the T-shaped double quantum dots (DQD) coupled to two ferromagnetic leads. There are both Fano effect and Kondo effect in the system, and due to their mutual interaction, the density of states, the current, and the differential conductance of the system depend sensitively on the spin-polarized strength. Thus the obtained results show that this system is provided with excellent spin filtering property, which indicates that this system may be a candidate for spin valve transistors in the spintronics.
Keywords:  spin polarized transport      Fano--Kondo effect      quantum dots  
Received:  25 August 2007      Revised:  28 September 2007      Accepted manuscript online: 
PACS:  72.25.-b (Spin polarized transport)  
  73.21.La (Quantum dots)  
  75.20.Hr (Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions)  
  79.60.Jv (Interfaces; heterostructures; nanostructures)  
Fund: Project supported by the Scientific Research Foundation of Sichuan Provincial Education, China (Grant No 2006A069), and Sichuan Provincial Research Foundation for Basic Research, China (Grant No 2006J13-155).

Cite this article: 

Yang Fu-Bin(羊富彬), Wu Shao-Quan(吴绍全), Yan Cong-Hua(闫从华),Huang Rui(黄睿), Hou Tao(侯涛), and Bi Ai-Hua(毕爱华) Spin-polarized transport through the T-shaped double quantum dots 2008 Chin. Phys. B 17 1383

[1] Adaptive genetic algorithm-based design of gamma-graphyne nanoribbon incorporating diamond-shaped segment with high thermoelectric conversion efficiency
Jingyuan Lu(陆静远), Chunfeng Cui(崔春凤), Tao Ouyang(欧阳滔), Jin Li(李金), Chaoyu He(何朝宇), Chao Tang(唐超), and Jianxin Zhong(钟建新). Chin. Phys. B, 2023, 32(4): 048401.
[2] Electron beam pumping improves the conversion efficiency of low-frequency photons radiated by perovskite quantum dots
Peng Du(杜鹏), Yining Mu(母一宁), Hang Ren(任航), Idelfonso Tafur Monroy, Yan-Zheng Li(李彦正), Hai-Bo Fan(樊海波), Shuai Wang(王帅), Makram Ibrahim, and Dong Liang(梁栋). Chin. Phys. B, 2023, 32(4): 048704.
[3] Thermoelectric signature of Majorana zero modes in a T-typed double-quantum-dot structure
Cong Wang(王聪) and Xiao-Qi Wang(王晓琦). Chin. Phys. B, 2023, 32(3): 037304.
[4] Ion migration in metal halide perovskite QLEDs and its inhibition
Yuhui Dong(董宇辉), Danni Yan(严丹妮), Shuai Yang(杨帅), Naiwei Wei(魏乃炜),Yousheng Zou(邹友生), and Haibo Zeng(曾海波). Chin. Phys. B, 2023, 32(1): 018507.
[5] Nonlinear optical rectification of GaAs/Ga1-xAlxAs quantum dots with Hulthén plus Hellmann confining potential
Yi-Ming Duan(段一名) and Xue-Chao Li(李学超). Chin. Phys. B, 2023, 32(1): 017303.
[6] High-quality CdS quantum dots sensitized ZnO nanotube array films for superior photoelectrochemical performance
Qian-Qian Gong(宫倩倩), Yun-Long Zhao(赵云龙), Qi Zhang(张奇), Chun-Yong Hu(胡春永), Teng-Fei Liu(刘腾飞), Hai-Feng Zhang(张海峰), Guang-Chao Yin(尹广超), and Mei-Ling Sun(孙美玲). Chin. Phys. B, 2022, 31(9): 098103.
[7] Large Seebeck coefficient resulting from chiral interactions in triangular triple quantum dots
Yi-Ming Liu(刘一铭) and Jian-Hua Wei(魏建华). Chin. Phys. B, 2022, 31(9): 097201.
[8] Dynamic transport characteristics of side-coupled double-quantum-impurity systems
Yi-Jie Wang(王一杰) and Jian-Hua Wei(魏建华). Chin. Phys. B, 2022, 31(9): 097305.
[9] Stability and luminescence properties of CsPbBr3/CdSe/Al core-shell quantum dots
Heng Yao(姚恒), Anjiang Lu(陆安江), Zhongchen Bai(白忠臣), Jinguo Jiang(蒋劲国), and Shuijie Qin(秦水介). Chin. Phys. B, 2022, 31(4): 046106.
[10] High-fidelity quantum sensing of magnon excitations with a single electron spin in quantum dots
Le-Tian Zhu(朱乐天), Tao Tu(涂涛), Ao-Lin Guo(郭奥林), and Chuan-Feng Li(李传锋). Chin. Phys. B, 2022, 31(12): 120302.
[11] Exciton emission dynamics in single InAs/GaAs quantum dots due to the existence of plasmon-field-induced metastable states in the wetting layer
Junhui Huang(黄君辉), Hao Chen(陈昊), Zhiyao Zhuo(卓志瑶), Jian Wang(王健), Shulun Li(李叔伦), Kun Ding(丁琨), Haiqiao Ni(倪海桥), Zhichuan Niu(牛智川), Desheng Jiang(江德生), Xiuming Dou(窦秀明), and Baoquan Sun(孙宝权). Chin. Phys. B, 2021, 30(9): 097805.
[12] Effect of surface oxygen vacancy defects on the performance of ZnO quantum dots ultraviolet photodetector
Hongyu Ma(马宏宇), Kewei Liu(刘可为), Zhen Cheng(程祯), Zhiyao Zheng(郑智遥), Yinzhe Liu(刘寅哲), Peixuan Zhang(张培宣), Xing Chen(陈星), Deming Liu(刘德明), Lei Liu(刘雷), and Dezhen Shen(申德振). Chin. Phys. B, 2021, 30(8): 087303.
[13] Phase- and spin-dependent manipulation of leakage of Majorana mode into double quantum dot
Fu-Bin Yang(羊富彬), Gan Ren(任淦), and Lin-Guo Xie(谢林果). Chin. Phys. B, 2021, 30(7): 078505.
[14] Suppression of leakage effect of Majorana bound states in the T-shaped quantum-dot structure
Wei-Jiang Gong(公卫江), Yu-Hang Xue(薛宇航), Xiao-Qi Wang(王晓琦), Lian-Lian Zhang(张莲莲), and Guang-Yu Yi(易光宇). Chin. Phys. B, 2021, 30(7): 077307.
[15] Anisotropic exciton Stark shift in hemispherical quantum dots
Shu-Dong Wu(吴曙东). Chin. Phys. B, 2021, 30(5): 053201.
No Suggested Reading articles found!