Hanle effect in transport through quantum dots coupled to ferromagnetic leads

被引：27

作者：

Braun, M ^{[1
]}

König, J

Martinek, J

机构：

[1] Ruhr Univ Bochum, Inst Theoret Phys 3, D-44780 Bochum, Germany

[2] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany

[3] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland

[4] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

EUROPHYSICS LETTERS | 2005年 / 72卷 / 02期

关键词：

D O I：

10.1209/epl/i2005-10230-0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We suggest a series of transport experiments on spin precession in quantum dots coupled to one or two ferromagnetic leads. A finite dot-spin polarization is created by spin injection and analyzed via the linear conductance through the dot, while an applied magnetic field gives rise to the Hanle effect. Such a Hanle experiment can be used to determine the spin lifetime in the quantum dot, to measure the spin injection efficiency into the dot, as well as proving the existence of intrinsic spin precession which is driven by the Coulomb interaction.

引用

页码：294 / 300

页数：7

共 24 条

[1] Theory of transport through quantum-dot spin valves in the weak-coupling regime -: art. no. 195345 [J].

Braun, M ;

König, J ;

Martinek, J .

PHYSICAL REVIEW B, 2004, 70 (19) :1-12

[2] Spin injection from (Ga,Mn)As into InAs quantum dots [J].

Chye, Y ;

White, ME ;

Johnston-Halperin, E ;

Gerardot, BD ;

Awschalom, DD ;

Petroff, PM .

PHYSICAL REVIEW B, 2002, 66 (20) :2013011-2013014

[3] Using single quantum states as spin filters to study spin polarization in ferromagnets [J].

Deshmukh, MM ;

Ralph, DC .

PHYSICAL REVIEW LETTERS, 2002, 89 (26)

[4] Electronic spin detection in molecules using scanning-tunneling-microscopy-assisted electron-spin resonance [J].

Durkan, C ;

Welland, ME .

APPLIED PHYSICS LETTERS, 2002, 80 (03) :458-460

[5]

Elzerman JM, 2004, NATURE, V430, P431, DOI 10.1039/nature02693

[6] Single-spin dynamics and decoherence in a quantum dot via charge transport [J].

Engel, HA ;

Loss, D .

PHYSICAL REVIEW B, 2002, 65 (19) :1-19

[7] Detection of single spin decoherence in a quantum dot via charge currents [J].

Engel, HA ;

Loss, D .

PHYSICAL REVIEW LETTERS, 2001, 86 (20) :4648-4651

[8] Hanle effect measurements of spin lifetimes in InAs self-assembled quantum dots [J].

Epstein, RJ ;

Fuchs, DT ;

Schoenfeld, WV ;

Petroff, PM ;

Awschalom, DD .

APPLIED PHYSICS LETTERS, 2001, 78 (06) :733-735

[9] Nonequilibrium transport through a vertical quantum dot in the absence of spin-flip energy relaxation [J].

Fujisawa, T ;

Austing, DG ;

Tokura, Y ;

Hirayama, Y ;

Tarucha, S .

PHYSICAL REVIEW LETTERS, 2002, 88 (23) :4

[10] SPIN-INJECTION EXPERIMENT [J].

JOHNSON, M ;

SILSBEE, RH .

PHYSICAL REVIEW B, 1988, 37 (10) :5326-5335

← 1 2 3 →