Please wait a minute...
Chin. Phys. B, 2012, Vol. 21(11): 117310    DOI: 10.1088/1674-1056/21/11/117310

Spin-dependent thermoelectric transport through double quantum dots

Wang Qiang (王强)a, Xie Hai-Qing (解海卿)a, Jiao Hu-Jun (焦虎军)a, Li Zhi-Jian (李志坚)a, Nie Yi-Hang (聂一行 )a b
a Institute of Theoretical Physics and Department of Physics, Shanxi University, Taiyuan 030006, China;
b Institute of Solid State Physics, Shanxi Datong University, Datong 037009, China
Abstract  We study the thermoelectric transport through a double-quantum-dot system with spin-dependent interdot coupling and ferromagnetic electrodes by means of the non-equilibrium Green's function in the linear response regime. It is found that the thermoelectric coefficients are strongly dependent on the splitting of the interdot coupling, the relative magnetic configurations, and the spin polarization of leads. In particular, the thermoelectric efficiency can reach a considerable value in the parallel configuration when the effective interdot coupling and the tunnel coupling between the quantum dots and the leads for the spin-down electrons are small. Moreover, the thermoelectric efficiency increases with the intradot Coulomb interaction increasing and can reach very high values at appropriate temperatures. In the presence of the magnetic field, the spin accumulation in the leads strongly suppresses the thermoelectric efficiency, and a pure spin thermopower can be obtained.
Keywords:  thermoelectric effect      double quantum dots      spin effect  
Received:  07 April 2012      Revised:  21 May 2012      Accepted manuscript online: 
PACS:  73.50.Lw (Thermoelectric effects)  
  65.80.-g (Thermal properties of small particles, nanocrystals, nanotubes, and other related systems)  
  85.80.Lp (Magnetothermal devices)  
  73.63.Kv (Quantum dots)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11274208,10974124, and 11004124) and the Shanxi Natural Science Foundation, China (Grant No. 2009011001-1).
Corresponding Authors:  Nie Yi-Hang     E-mail:

Cite this article: 

Wang Qiang (王强), Xie Hai-Qing (解海卿), Jiao Hu-Jun (焦虎军), Li Zhi-Jian (李志坚), Nie Yi-Hang (聂一行 ) Spin-dependent thermoelectric transport through double quantum dots 2012 Chin. Phys. B 21 117310

[1] Harman T C, Taylor P J, Walsh M P and LaForge B E 2002 Science 297 2229
[2] Scheibner R, Buhmann H, Reuter D, Kiselev M N and Molenkamp L W 2005 Phys. Rev. Lett. 95 176602
[3] Scheibner R, Konig M, Reuter D, Wieck A D, Buhmann H and Molenkamp L W 2008 New J. Phys. 10 083016
[4] Zianni X 2007 Phys. Rev. B 75 045344
[5] Chen X O, Dong B and Lei X L 2008 Chin. Phys. Lett. 25 3032
[6] Dubi Y and Ventra M Di 2009 Phys. Rev. B 79 081302(R)
[7] swirkowicz R, Weirzbicki M and Barna's J 2009 Phys. Rev. B 80 195409
[8] swirkowicz R, Weirzbicki M and Barna's J 2010 J. Phys. Conf. Ser. 213 012021
[9] Weirzbicki M and swirkowicz R 2010 J. Phys.: Condens. Matter 22 185302
[10] Crepieux A, Simkovic F, Cambon B and Michelini F 2011 Phys. Rev. B 83 153417
[11] Liu J, Sun Q F and Xie X C 2010 Phys. Rev. B 81 245323
[12] Kuo D M T and Chang Y C 2010 Phys. Rev. B 81 205321
[13] Chi F, Zheng J, Lu X D and Zhang K C 2011 Phys. Lett. A 375 1352
[14] Tagani M B and Soleimani H R 2012 Physica B 152 914
[15] Rajput G, Ahluwalia P K and Sharma K C 2011 Physica B 406 3328
[16] Liu Y S and Yang X F 2010 J. Appl. Phys. 108 023701
[17] Liu Y S, Zhang D B, Yang X F and Feng J F 2011 Nanotechnology 22 225201
[18] Weirzbicki M and swirkowicz R 2011 Phys. Rev. B 84 075410
[19] Xue H J, Lü T Q, Zhang H C, Yin H T, Cui L and He Z L 2011 Chin. Phys. B 20 027301
[20] Boese D and Fazio R 2001 Europhys. Lett. 56 576
[21] Kim T S and Hershfield S 2002 Phys. Rev. Lett. 88 136601
[22] Krawiec M and Wysokinski K I 2007 Phys. Rev. B 75 155330
[23] Zhang Z Y 2007 J. Phys.: Condens. Matter 19 086214
[24] Franco R, Valencia J S and Figueira M S 2008 J. Appl. Phys. 103 07B726
[25] Schops V, Zlatić V and Costi T A 2010 Phys. Rev. B 81 235127
[26] Uchida K, Takahashi S, Harii K, Ieda J, Koshibae W, Ando K, Maekawa S and Saitoh E 2008 Nature 455 778
[27] Slachter A, Bakker F L, Adam J P and vanWees B J 2010 Nat. Phys. 6 879
[28] Jaworski C M, Yang J, Mack S, Awschalom D D, Heremans J P and Myers R C 2010 Nat. Mater. 9 898
[29] Wang R Q, Sheng L, Shen R, Wang B G and Xing D Y 2010 Phys. Rev. Lett. 105 057202
[30] Qi F H, Ying Y B and Jin G J 2011 Phys. Rev. B 83 075310
[31] Weirzbicki M and swirkowicz R 2010 Phys. Rev. B 82 165334
[32] Weirzbicki M and swirkowicz R 2011 Phys. Lett. A 375 609
[33] Zhu L C, Jiang X D, Zu X T and Lü H F 2010 Phys. Lett. A 374 4269
[34] Liu Y S, Yang X F and Feng J F 2011 J. Appl. Phys. 109 053712
[35] Trocha P and Barna's J 2012 Phys. Rev. B 85 085408
[36] Xue H J, Lü T Q, Zhang H C, Yin H T, Cui L and He Z L 2012 Chin. Phys. B 21 037201
[37] Li Z J, Jin Y H, Nie Y H and Liang J Q 2008 J. Phys.: Condens. Matter 20 085214
[38] Wang H X, Y W and Wang F W 2011 J. Appl. Phys. 109 053710
[39] Buttiker M 1983 Phys. Rev. B 27 6178
[40] Huttel A K, Ludwig S, Lorenz H, Eberl K and Kotthaus J P 2005 Phys. Rev. B 72 081310
[41] Haug H and Jauho A P 2008 Quantum Kinetics in Transport and Optics of Semiconductors (2nd edn.)(Berlin: Springer-Verlag) pp. 181-210
[42] Yin H T, Lü T Q, Liu X J and Xue H J 2009 Chin. Phys. Lett. 26 047302
[1] 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.
[2] Electron transfer properties of double quantum dot system in a fluctuating environment
Lujing Jiang(姜露静), Kang Lan(蓝康), Zhenyu Lin(林振宇), and Yanhui Zhang(张延惠). Chin. Phys. B, 2021, 30(4): 040307.
[3] Enhanced thermoelectric properties in two-dimensional monolayer Si2BN by adsorbing halogen atoms
Cheng-Wei Wu(吴成伟), Changqing Xiang(向长青), Hengyu Yang(杨恒玉), Wu-Xing Zhou(周五星), Guofeng Xie(谢国锋), Baoli Ou(欧宝立), and Dan Wu(伍丹). Chin. Phys. B, 2021, 30(3): 037304.
[4] Energy cooperation in quantum thermoelectric systems withmultiple electric currents
Yefeng Liu(刘叶锋), Jincheng Lu(陆金成), Rongqian Wang(王荣倩), Chen Wang(王晨), Jian-Hua Jiang(蒋建华). Chin. Phys. B, 2020, 29(4): 040504.
[5] A quantum walk in phase space with resonator-assisted double quantum dots
Zhi-Hao Bian(边志浩), Hao Qin(秦豪), Xiang Zhan(詹翔), Jian Li(李剑), Peng Xue(薛鹏). Chin. Phys. B, 2016, 25(2): 020307.
[6] Spin-dependent thermoelectric effect and spin battery mechanism in triple quantum dots with Rashba spin-orbital interaction
Wei-Ping Xu(徐卫平), Yu-Ying Zhang(张玉颖), Qiang Wang(王强), Yi-Hang Nie(聂一行). Chin. Phys. B, 2016, 25(11): 117307.
[7] Thermoelectric effects and topological insulators
Yong Xu(徐勇). Chin. Phys. B, 2016, 25(11): 117309.
[8] Thermoelectric transport through a quantum dot with a magnetic impurity
Yu Zhen (于震), Guo Yu (郭宇), Zheng Jun (郑军), Chi Feng (迟锋). Chin. Phys. B, 2013, 22(11): 117303.
[9] Thermospin effects in parallel coupled double quantum dots in the presence of the Rashba spin–orbit interaction and Zeeman splitting
Xue Hui-Jie(薛惠杰), LŰ Tian-Quan(吕天全), Zhang Hong-Chen(张红晨), Yin Hai-Tao(尹海涛), Cui Lian(催莲), and He Ze-Long(贺泽龙) . Chin. Phys. B, 2012, 21(3): 037201.
[10] Spin-polarized current in double quantum dots
Li Ai-Xian (李爱仙), Duan Su-Qing (段素青 ). Chin. Phys. B, 2012, 21(11): 117201.
[11] The binding energy of a hydrogenic impurity in self-assembled double quantum dots
Zhang Hong(张红), Wang Xue(王学), Zhao Jian-Feng(赵剑锋), and Liu Jian-Jun(刘建军) . Chin. Phys. B, 2011, 20(12): 127301.
[12] Effect of nanocomposite structure on the thermoelectric properties of 0.7-at% Bi-doped Mg2Si nanocomposite
Yang Mei-Jun(杨梅君), Shen Qiang(沈强), and Zhang Lian-Meng(张联盟) . Chin. Phys. B, 2011, 20(10): 106202.
[13] Magnetotransport through an Aharonov-Bohm ring with parallel double quantum dots coupled to ferromagnetic leads
Wu Shao-Quan(吴绍全), Hou Tao(侯涛), Zhao Guo-Ping(赵国平), and Yu Wan-Lun(余万伦). Chin. Phys. B, 2010, 19(4): 047202.
[14] Disappearance of isospin effect in projectile fragmentation at intermediate energy
Ma Chun-Wang(马春旺) Wei Hui-Ling(魏慧玲), Wang Jun-Yang(王俊阳), and Liu Gao-Jie(刘高杰). Chin. Phys. B, 2009, 18(11): 4781-4785.
[15] Spin-flip process through double quantum dots coupled to two half-metallic ferromagnetic leads
Yan Cong-Hua(闫从华),Wu Shao-Quan(吴绍全), Huang Rui(黄睿), and Sun Wei-Li(孙威立). Chin. Phys. B, 2008, 17(1): 296-302.
No Suggested Reading articles found!