Exchange Control of Nuclear Spin Diffusion in a Double Quantum Dot

被引：40

作者：

Reilly, D. J. ^{[1
,5
]}

Taylor, J. M. ^{[2
]}

Petta, J. R. ^{[3
]}

Marcus, C. M. ^{[1
]}

Hanson, M. P. ^{[4
]}

Gossard, A. C. ^{[4
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

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

[3] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[4] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[5] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 23期

关键词：

ELECTRON; POLARIZATION; RELAXATION; GAAS;

D O I：

10.1103/PhysRevLett.104.236802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influence of gate-controlled two-electron exchange on the relaxation of nuclear polarization in small ensembles (N similar to 10(6)) of nuclear spins is examined in a GaAs double quantum dot system. Waiting in the (2,0) charge configuration, which has large exchange splitting, reduces the nuclear diffusion rate compared to that of the (1,1) configuration. Matching exchange to Zeeman splitting significantly increases the nuclear diffusion rate.

引用

页数：4

共 37 条

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