Charge oscillation and many-body effect in triangular quantum dots

doi:10.1088/1674-1056/21/11/117501

中国物理B ›› 2012, Vol. 21 ›› Issue (11): 117501-117501.doi: 10.1088/1674-1056/21/11/117501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Charge oscillation and many-body effect in triangular quantum dots

熊永臣, 王为忠

Department of Physics, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education,Wuhan University, Wuhan 430072, China

收稿日期:2012-04-01 修回日期:2012-05-18 出版日期:2012-10-01 发布日期:2012-10-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174228 and 10874132).

Charge oscillation and many-body effect in triangular quantum dots

Xiong Yong-Chen (熊永臣), Wang Wei-Zhong (王为忠 )

Department of Physics, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education,Wuhan University, Wuhan 430072, China

Received:2012-04-01 Revised:2012-05-18 Online:2012-10-01 Published:2012-10-01
Contact: Wang Wei-Zhong E-mail:wzwang@whu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174228 and 10874132).

摘要/Abstract

摘要： We study the charge oscillation in the triangular quantum dots symmetrically coupled to the leads. A strong charge oscillation is observed even for a very small level difference. We attribute this oscillation behavior to the many-body effect in the strongly correlated system instead of the physical scenarios based on the mean-field approach in the previous works for the two-level dot. The level difference induces the difference of the occupations between different dots, while the symmetry of the many-body states favors the homogeneous distribution of the charge density on the three dots. The interplay of these two factors results in the charge oscillation.

关键词: charge oscillation, many-body effect, triangular quantum dots

Abstract: We study the charge oscillation in the triangular quantum dots symmetrically coupled to the leads. A strong charge oscillation is observed even for a very small level difference. We attribute this oscillation behavior to the many-body effect in the strongly correlated system instead of the physical scenarios based on the mean-field approach in the previous works for the two-level dot. The level difference induces the difference of the occupations between different dots, while the symmetry of the many-body states favors the homogeneous distribution of the charge density on the three dots. The interplay of these two factors results in the charge oscillation.

Key words: charge oscillation, many-body effect, triangular quantum dots

中图分类号: (Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions)

75.20.Hr

73.63.-b (Electronic transport in nanoscale materials and structures) 73.23.-b (Electronic transport in mesoscopic systems)

熊永臣, 王为忠 . Charge oscillation and many-body effect in triangular quantum dots[J]. 中国物理B, 2012, 21(11): 117501-117501.

Xiong Yong-Chen (熊永臣), Wang Wei-Zhong (王为忠 ). Charge oscillation and many-body effect in triangular quantum dots[J]. Chin. Phys. B, 2012, 21(11): 117501-117501.

参考文献 42

[1]	Park J, Pasupathy A N, Goldsmith J I, Chang C, Yaish Y, Petta J R, Rinkoski M, Sethna J P, Abruña H D, McEuen P L and Ralph D C 2002 Nature 417 723
[2]	Field M, Smith C G, Pepper M, Ritchie D A, Frost J E F, Jones G A C and Hasko D G 1993 Phys. Rev. Lett. 70 1311
[3]	Leobandung E, Guo L and Chou S Y 1995 Appl. Phys. Lett. 67 7
[4]	Jiang Z T 2010 Chin. Phys. B 19 077307
[5]	Wen R, Zhang D P and Tian G S 2012 Chin. Phys. B 21 037401
[6]	Girvin S M, Glazman L I, Jonson M, Penn D R and Stiles M D 1990 Phys. Rev. Lett. 64 3183
[7]	Stafford C A and Sarma S D 1994 Phys. Rev. Lett. 72 3590
[8]	Simmel F, Heinzel T and Wharam D A 1997 Europhys. Lett. 38 123
[9]	Aleiner I L, Brouwer P W and Glazman L I 2002 Physics Reports 358 309
[10]	Hackenbroich G, Heiss W D and Weidenmuller H A 1997 Phys. Rev. Lett. 79 127
[11]	Silvestrov P G and Imry Y 2000 Phys. Rev. Lett. 85 2565
[12]	Silvestrov P G and Imry Y 2001 Phys. Rev. B 65 035309
[13]	König J and Gefen Y 2005 Phys. Rev. B 71 201308 (R)
[14]	Berkovits R, Oppen F V and Gefen Y 2005 Phys. Rev. Lett. 94 076802
[15]	Sindel M, Silva A, Oreg Y and Delft J V 2005 Phys. Rev. B 72 125316
[16]	Field M, Smith C G, Pepper M, Ritchie D A, Frost J E F, Jones G A C and Hasko D G 1993 Phys. Rev. Lett. 70 1311
[17]	Goldstein M, Berkovits R and Gefen Y 2010 Phys. Rev. Lett. 104 226805
[18]	Schuster R, Buks E, Heiblum M, Mahalu D, Umansky V and Shtrikman H 1997 Nature 385 417
[19]	Avinun-Kalish M, Heiblum M, Zarchin O, Mahalu D and Umansky V 2005 Nature 436 529
[20]	Silva A, Oreg Y and Gefen Y 2002 Phys. Rev. B 66 195316
[21]	Meden V and Marquardt F 2006 Phys. Rev. Lett. 96 146801
[22]	Golosov D I and Gefen Y 2006 Phys. Rev. B 74 205316
[23]	Karrasch C, Hecht T, Weichselbaum A, Oreg Y, Delft T V and Meden V 2007 Phys. Rev. Lett. 98 186802
[24]	Goldstein M and Berkovits R 2007 New J. Phys. 9 118
[25]	Goldstein M, Berkovits R, Gefen Y and Weidenmuller H A 2009 Phys. Rev. B 79 125307
[26]	Lee H W and Kim S 2007 Phys. Rev. Lett. 98 186805
[27]	Kashcheyevs V, Schiller A, Aharony A and Entin-Wohlman O 2007 Phys. Rev. B 75 115313
[28]	Kashcheyevs V, Karrasch C, Hecht T, Weichselbaum A, Meden V and Schiller A 2009 Phys. Rev. Lett. 102 136805
[29]	Mitchell A K, Jarrold T F and Logan D E 2009 Phys. Rev. B 79 085124
[30]	Mitchell A K and Logan D E 2010 Phys. Rev. B 81 075126
[31]	Kuzmenko T, Kikoin K and Avishai Y 2006 Phys. Rev. Lett. 96 046601
[32]	Kuzmenko T, Kikoin K and Avishai Y 2006 Phys. Rev. B 73 235310
[33]	Zitko R and Bonca J 2007 Phys. Rev. Lett. 98 047203
[34]	Ingersent K, Ludwig A W W and Affleck I 2005 Phys. Rev. Lett. 95 257204
[35]	Zitko R, Bonca J, Ramsak A and Rejec T 2006 Phys. Rev. B 73 153307
[36]	Wang W Z 2007 Phys. Rev. B 76 115114
[37]	Delgado F, Shim Y P, Korkusinski M, Gaudreau L, Studenikin S A, Sachrajda A S and Hawrylak P 2008 Phys. Rev. Lett. 101 226810
[38]	Delgado F, Shim Y P, Korkusinski M, and Hawrylak P 2007 Phys. Rev. B 76, 115332
[39]	Korkusinski M, Gimenez I P, Hawrylak P, Gaudreau L, Studenikin S A and Sachrajda A S 2007 Phys. Rev. B 75 115301
[40]	Saraga D S and Loss D 2003 Phys. Rev. Lett. 90 166803
[41]	Krishna-murthy H R, Wilkins J W, and Wilson K G 1980 Phys. Rev. B 21 1003
[42]	Krishna-murthy H R, Wilkins J W, and Wilson K G 1980 Phys. Rev. B 21 1044

Charge oscillation and many-body effect in triangular quantum dots

Charge oscillation and many-body effect in triangular quantum dots

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