Voltage control of the magnetic properties of charged semiconductor quantum dots containing magnetic ions

被引：35

作者：

Climente, JI ^{[1
]}

Korkusinski, M

Hawrylak, P

Planelles, J

机构：

[1] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada

[2] Univ Jaume 1, Dept Ciencies Expt, E-12080 Castellon de La Plana, Spain

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.71.125321

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We describe a model device allowing voltage control of the magnetic properties of magnetic ions in III-V self-assembled semiconductor quantum dots. The applied voltage, combined with Coulomb blockade, allows the control of the number of holes in the quantum dot. The spins of the holes interact with the spins of the magnetic ions via sp-d exchange interactions. The spectrum of a Mn ion in a p-type InAs quantum disk in a magnetic field is calculated as a function of the number of holes described by the Luttinger-Kohn Hamiltonian. For a neutral Mn acceptor, the spin of the hole leads to an effective magnetic field which strongly modifies the magnetization of the ion. The magnetization can be modified further by charging the dot with an additional hole. The interacting holes form a singlet parity ground state, suppress the effective field and modify the magnetic moment of the charged complex.

引用

页数：5

共 25 条

[1] Theory of magnetic anisotropy in III1-xMnxV ferromagnets -: art. no. 054418 [J].

Abolfath, M ;

Jungwirth, T ;

Brum, J ;

MacDonald, AH .

PHYSICAL REVIEW B, 2001, 63 (05)

[2] Magnetic field dependent heat capacity of the molecule-based magnetic material NBu4[FeIIFeIII(ox)3] (Bu = n-C4H9+, ox = oxalate) [J].

Bhattacharjee, A ;

Saito, K ;

Sorai, M .

SOLID STATE COMMUNICATIONS, 2000, 113 (10) :543-548

[3] Exciton magnetic polaron in semimagnetic semiconductor nanocrystals [J].

Bhattacharjee, AK ;

laGuillaume, CBA .

PHYSICAL REVIEW B, 1997, 55 (16) :10613-10620

[4] EFFECTIVE MASSES OF HOLES AT GAAS-ALGAAS HETEROJUNCTIONS [J].

BROIDO, DA ;

SHAM, LJ .

PHYSICAL REVIEW B, 1985, 31 (02) :888-892

[5] Electron and hole states in diluted magnetic semiconductor quantum dots [J].

Chang, K ;

Li, SS ;

Xia, JB ;

Peeters, FM .

PHYSICAL REVIEW B, 2004, 69 (23) :235203-1

[6] Magnetic field tuning of the effective g factor in a diluted magnetic semiconductor quantum dot [J].

Chang, K ;

Xia, JB ;

Peeters, FM .

APPLIED PHYSICS LETTERS, 2003, 82 (16) :2661-2663

[7] SPECTROSCOPY OF QUANTUM LEVELS IN CHARGE-TUNABLE INGAAS QUANTUM DOTS [J].

DREXLER, H ;

LEONARD, D ;

HANSEN, W ;

KOTTHAUS, JP ;

PETROFF, PM .

PHYSICAL REVIEW LETTERS, 1994, 73 (16) :2252-2255

[8] The electronic structure of semiconductor nanocrystals [J].

Efros, AL ;

Rosen, M .

ANNUAL REVIEW OF MATERIALS SCIENCE, 2000, 30 :475-521

[9] Ferromagnetism mediated by few electrons in a semimagnetic quantum dot -: art. no. 117201 [J].

Fernández-Rossier, J ;

Brey, L .

PHYSICAL REVIEW LETTERS, 2004, 93 (11) :117201-1

[10] DILUTED MAGNETIC SEMICONDUCTORS [J].

FURDYNA, JK .

JOURNAL OF APPLIED PHYSICS, 1988, 64 (04) :R29-R64

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