Correlations of spin currents through a quantum dot induced by the Kondo effect

被引：13

作者：

Kindermann, M ^{[1
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.71.165332

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study correlations of spin currents flowing through a Coulomb blockaded quantum dot. While they vanish for generic parameter values in the regime of elastic cotunneling, these correlations develop as the quantum dot enters the Kondo regime. We analyze this effect for a small effective Kondo coupling such that fluctuations of the spin of the quantum dot can be captured by the perturbative renormalization group. Even in this regime we find that-unlike the mean current-the spin current correlator is not accessible by perturbation theory. It is nonperturbative in the effective coupling of the QD to the leads.

引用

页数：5

共 20 条

[11] Zeeman energy and spin relaxation in a one-electron quantum dot
Hanson, R
Witkamp, B
Vandersypen, LMK
van Beveren, LHW
Elzerman, JM
Kouwenhoven, LP
[J]. PHYSICAL REVIEW LETTERS, 2003, 91 (19)
[12] Hewson A, 1993, KONDO PROBLEM HEAVY
[13] Universality of the Kondo effect in a quantum dot out of equilibrium
Kaminski, A
Nazarov, YV
Glazman, LI
[J]. PHYSICAL REVIEW B, 2000, 62 (12): : 8154 - 8170
[14] Kouwenhoven L, 2001, PHYS WORLD, V14, P33
[15] Shot noise through a quantum dot in the Kondo regime
Meir, Y
Golub, A
[J]. PHYSICAL REVIEW LETTERS, 2002, 88 (11) : 4 - 116802
[16] Full counting statistics of a general quantum mechanical variable
Nazarov, YV
Kindermann, M
[J]. EUROPEAN PHYSICAL JOURNAL B, 2003, 35 (03) : 413 - 420
[17] Negele J. W., 1988, QUANTUM MANY PARTICL
[18] Kondo effect in quantum dots at high voltage:: Universality and scaling -: art. no. 156802
Rosch, A
Kroha, J
Wölfle, P
[J]. PHYSICAL REVIEW LETTERS, 2001, 87 (15) : 156802 - 156802
[19] Observation of the e/3 fractionally charged Laughlin quasiparticle
Saminadayar, L
Glattli, DC
Jin, Y
Etienne, B
[J]. PHYSICAL REVIEW LETTERS, 1997, 79 (13) : 2526 - 2529
[20] Spin-current shot noise as a probe of interactions in mesoscopic systems
Sauret, O
Feinberg, D
[J]. PHYSICAL REVIEW LETTERS, 2004, 92 (10) : 106601 - 1

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