Experimental evidence for antiferromagnetic spin-spin interaction between carriers localized in coupled quantum dots

被引：23
作者：
Lee, S [1 ]
Lee, HS
Lee, JY
Dobrowolska, M
Furdyna, JK
机构：
[1] Korea Univ, Dept Phys, Seoul 136701, South Korea
[2] Korea Univ, Inst Nano Sci, Seoul 136701, South Korea
[3] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea
[4] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA
来源：
APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 03期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1063/1.1855422
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A self-assembled quantum dot (QD) system consisting of adjacent CdSe and CdZnMnSe QD layers in a ZnSe matrix was investigated using polarization-selective magnetophotoluminescence (PL). We can unambiguously identify which QD peak originates from which material, because PL from CdZnMnSe (a diluted magnetic semiconductor) exhibits a large Zeeman shift in the presence of a magnetic field. Significant enhancement of the degree of sigma(-) circular polarization emitted by the nonmagnetic CdSe QDs is observed in the double layer system, as compared to that observed in similar CdSe QDs without the influence of neighboring CdZnMnSe QDs. This behavior can be understood in terms of antiferromagnetic interaction between carrier spins localized in pairs of CdSe and CdZnMnSe QDs that are electronically coupled. (C) 2005 American Institute of Physics.
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页码：1 / 3
页数：3
相关论文
共 18 条
[1]   Spectroscopy on single dots -: Monitoring carrier interaction with the environment [J].
Bacher, G ;
Seufert, J ;
Welsch, MK ;
Schömig, H ;
Obert, M ;
Kulakovskii, VD ;
Forchel, A .
ADVANCES IN SOLID STATE PHYSICS 41, 2001, 41 :51-62
[2]  
Bacher G, 2001, PHYS STATUS SOLIDI B, V224, P573, DOI 10.1002/1521-3951(200103)224:2<573::AID-PSSB573>3.0.CO
[3]  
2-F
[4]   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
[5]   Single-hole spin relaxation in a quantum dot [J].
Flissikowski, T ;
Akimov, IA ;
Hundt, A ;
Henneberger, F .
PHYSICAL REVIEW B, 2003, 68 (16)
[6]   DILUTED MAGNETIC SEMICONDUCTORS [J].
FURDYNA, JK .
JOURNAL OF APPLIED PHYSICS, 1988, 64 (04) :R29-R64
[7]   Magnetooptical studies of a single quantum dot: Excited states and spin flip of excitons [J].
Heller, W ;
Bockelmann, U .
PHYSICAL REVIEW B, 1997, 55 (08) :R4871-R4874
[8]   CdSe quantum dots in a Zn1-xMnxSe matrix:: new effects due to the presence of Mn [J].
Kim, CS ;
Kim, M ;
Lee, S ;
Kossut, J ;
Furdyna, JK ;
Dobrowolska, M .
JOURNAL OF CRYSTAL GROWTH, 2000, 214 :395-399
[9]   Fine structure of biexciton emission in symmetric and asymmetric CdSe/ZnSe single quantum dots [J].
Kulakovskii, VD ;
Bacher, G ;
Weigand, R ;
Kümmell, T ;
Forchel, A ;
Borovitskaya, E ;
Leonardi, K ;
Hommel, D .
PHYSICAL REVIEW LETTERS, 1999, 82 (08) :1780-1783
[10]   Influence of inter-dot coupling on spin polarization of carriers in double quantum dots [J].
Lee, S ;
Yang, SRE ;
Dobrowolska, M ;
Furdyna, JK .
SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 2004, 19 (09) :1125-1130
12