Nuclear-spin-induced oscillatory current in spin-blockaded quantum dots

被引：242

作者：

Ono, K

Tarucha, S

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[2] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[3] Japan Sci & Technol Corp, ERATO, Mesoscop Correlat Project, Atsugi, Kanagawa 2430198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 25期

基金：

日本学术振兴会;

关键词：

D O I：

10.1103/PhysRevLett.92.256803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show experimentally that electron transport through GaAs-based double quantum dots can be affected by ambient nuclear spin states in a certain regime where transport is blocked in the absence of electron spin flip. Current through the dots oscillates in time with a period up to 200 s depending on magnetic field. Oscillation is quenched by application of a continuous wave ac magnetic field which can induce nuclear magnetic resonance in Ga-71 or Ga-69. A possible mechanism for dynamically polarizing the nuclear spins is proposed.

引用

收藏

页码：256803 / 1

页数：4

相关论文

共 28 条

[1] Quantum dot molecules [J].

Austing, DG ;

Honda, T ;

Muraki, K ;

Tokura, Y ;

Tarucha, S .

PHYSICA B-CONDENSED MATTER, 1998, 249 :206-209

[2]

Awschalom DD, 2002, NANOSCI TECHNOL, P147

[3] MAGNETOQUANTUM OSCILLATIONS OF THE NUCLEAR-SPIN-LATTICE RELAXATION NEAR A 2-DIMENSIONAL ELECTRON-GAS [J].

BERG, A ;

DOBERS, M ;

GERHARDTS, RR ;

VONKLITZING, K .

PHYSICAL REVIEW LETTERS, 1990, 64 (21) :2563-2566

[4]

DENG C, CONDMAT0402428

[5] Dynamic nuclear polarization at the edge of a two-dimensional electron gas [J].

Dixon, DC ;

Wald, KR ;

McEuen, PL ;

Melloch, MR .

PHYSICAL REVIEW B, 1997, 56 (08) :4743-4750

[6] ELECTRICAL DETECTION OF NUCLEAR MAGNETIC-RESONANCE IN GAAS-ALXGA1-XAS HETEROSTRUCTURES [J].

DOBERS, M ;

VONKLITZING, K ;

SCHNEIDER, J ;

WEIMANN, G ;

PLOOG, K .

PHYSICAL REVIEW LETTERS, 1988, 61 (14) :1650-1653

[7] Nucleus-mediated spin-flip transitions in GaAs quantum dots [J].

Erlingsson, SI ;

Nazarov, YV ;

Fal'ko, VI .

PHYSICAL REVIEW B, 2001, 64 (19)

[8] Current-induced entanglement of nuclear spins in quantum dots [J].

Eto, M ;

Ashiwa, T ;

Murata, M .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2004, 73 (02) :307-310

[9] Allowed and forbidden transitions in artificial hydrogen and helium atoms [J].

Fujisawa, T ;

Austing, DG ;

Tokura, Y ;

Hirayama, Y ;

Tarucha, S .

NATURE, 2002, 419 (6904) :278-281

[10] Electrically controlled nuclear spin polarization and relaxation by quantum-Hall states [J].

Hashimoto, K ;

Muraki, K ;

Saku, T ;

Hirayama, Y .

PHYSICAL REVIEW LETTERS, 2002, 88 (17) :4