Nuclear spin diffusion in quantum dots: Effects of inhomogeneous hyperfine interaction

被引：42

作者：

Deng, CX ^{[1
]}

Hu, XD ^{[1
]}

机构：

[1] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.72.165333

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the effect of contact hyperfine interaction on the nuclear spin diffusion coefficients in semiconductor quantum dots. The diffusion coefficients are calculated with both the method of moment and density matrix. We show that nuclear spin diffusion is strongly suppressed by the nonuniform hyperfine coupling resulting from the confined electron wave function. Our results agree with the observed suppression of nuclear spin diffusion in these structures in recent experiments, and clarify the degree of validity of the method of moment in an inhomogeneous system.

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页数：8

相关论文

共 39 条

[1] OPTICALLY PUMPED NMR EVIDENCE FOR FINITE-SIZE SKYRMIONS IN GAAS QUANTUM-WELLS NEAR LANDAU-LEVEL FILLING NU=1 [J].

BARRETT, SE ;

DABBAGH, G ;

PFEIFFER, LN ;

WEST, KW ;

TYCKO, R .

PHYSICAL REVIEW LETTERS, 1995, 74 (25) :5112-5115

[2] Critical behavior of nuclear-spin diffusion in GaAs/AlGaAs heterostructures near Landau level filling nu=1 [J].

Bayot, V ;

Grivei, E ;

Beuken, JM ;

Melinte, S ;

Shayegan, M .

PHYSICAL REVIEW LETTERS, 1997, 79 (09) :1718-1721

[3] ON THE INTERACTION OF NUCLEAR SPINS IN A CRYSTALLINE LATTICE [J].

BLOEMBERGEN, N .

PHYSICA, 1949, 15 (3-4) :386-426

[4]

Bowden CM, 2000, LASER PHYS, V10, P35

[5] Suppression of spin diffusion near a micron-size ferromagnet [J].

Budakian, R ;

Mamin, HJ ;

Rugar, D .

PHYSICAL REVIEW LETTERS, 2004, 92 (03) :4

[6]

BUISHVIL.LL, 1965, FIZ TVERD TELA+, V7, P580

[7] SPIN DIFFUSION IN NMR IN SOLIDS [J].

CHEUNG, TTP .

PHYSICAL REVIEW B, 1981, 23 (03) :1404-1418

[8] Theory of nuclear-induced spectral diffusion: Spin decoherence of phosphorus donors in Si and GaAs quantum dots [J].

de Sousa, R ;

Das Sarma, S .

PHYSICAL REVIEW B, 2003, 68 (11) :1153221-11532213

[9] Electron spin coherence in semiconductors: Considerations for a spin-based solid-state quantum computer architecture [J].

de Sousa, R ;

Das Sarma, S .

PHYSICAL REVIEW B, 2003, 67 (03)

[10] Electron and nuclear spin interactions in the optical spectra of single GaAs quantum dots [J].

Gammon, D ;

Efros, AL ;

Kennedy, TA ;

Rosen, M ;

Katzer, DS ;

Park, D ;

Brown, SW ;

Korenev, VL ;

Merkulov, IA .

PHYSICAL REVIEW LETTERS, 2001, 86 (22) :5176-5179

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