Laser-controlled magnetization in a single magnetic semiconductor quantum dot

H. Schömig; G. Bacher; A. Forchel; S. Lee; M. Dobrowolska; J. K. Furdyna

Laser-controlled magnetization in a single magnetic semiconductor quantum dot

H. Schömig, G. Bacher, A. Forchel, S. Lee, M. Dobrowolska, J. K. Furdyna

Research output: Contribution to journal › Article › peer-review

Abstract

The photoluminescene signal of individual semimagnetic CdSe/Zn _0.75Mn_0.25Se quantum dots is used to study the magnetization of the Mn²⁺ spin system in the exchange field of a single exciton. We demonstrate that by increasing the laser excitation power a significant blue shift of the photoluminescence signal occurs. This is attributed to a laser-induced demagnetization, i.e. the laser-generated carriers heat the Mn²⁺ spin system via spin-flip exchange scattering.

Original language	English
Pages (from-to)	379-382
Number of pages	4
Journal	Journal of Superconductivity and Novel Magnetism
Volume	16
Issue number	2
Publication status	Published - 2003
Externally published	Yes

Keywords

Diluted magnetic semiconductors
Exciton magnetic polaron
Nanomagnetism
Quantum dots
Spin heating

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

@article{36437d5b63914bb287b7a24c68a79683,

title = "Laser-controlled magnetization in a single magnetic semiconductor quantum dot",

abstract = "The photoluminescene signal of individual semimagnetic CdSe/Zn 0.75Mn0.25Se quantum dots is used to study the magnetization of the Mn2+ spin system in the exchange field of a single exciton. We demonstrate that by increasing the laser excitation power a significant blue shift of the photoluminescence signal occurs. This is attributed to a laser-induced demagnetization, i.e. the laser-generated carriers heat the Mn2+ spin system via spin-flip exchange scattering.",

keywords = "Diluted magnetic semiconductors, Exciton magnetic polaron, Nanomagnetism, Quantum dots, Spin heating",

author = "H. Sch{\"o}mig and G. Bacher and A. Forchel and S. Lee and M. Dobrowolska and Furdyna, {J. K.}",

note = "Funding Information: The authors are grateful to A. A. Maksimov and V. D. Kulakovskii for their fruitful discussions and to M. Emmerling for his expert technical assistance. The work at W{\"u}rzburg was supported by the Deutsche Forschungsgemeinschaft under SFB 410, by the (U.S.) National Science Foundation Grant No. DMR-0072897 and by the DARPA program.",

year = "2003",

language = "English",

volume = "16",

pages = "379--382",

journal = "Journal of Superconductivity and Novel Magnetism",

issn = "1557-1939",

publisher = "Springer New York",

number = "2",

}

TY - JOUR

T1 - Laser-controlled magnetization in a single magnetic semiconductor quantum dot

AU - Schömig, H.

AU - Bacher, G.

AU - Forchel, A.

AU - Lee, S.

AU - Dobrowolska, M.

AU - Furdyna, J. K.

N1 - Funding Information: The authors are grateful to A. A. Maksimov and V. D. Kulakovskii for their fruitful discussions and to M. Emmerling for his expert technical assistance. The work at Würzburg was supported by the Deutsche Forschungsgemeinschaft under SFB 410, by the (U.S.) National Science Foundation Grant No. DMR-0072897 and by the DARPA program.

PY - 2003

Y1 - 2003

N2 - The photoluminescene signal of individual semimagnetic CdSe/Zn 0.75Mn0.25Se quantum dots is used to study the magnetization of the Mn2+ spin system in the exchange field of a single exciton. We demonstrate that by increasing the laser excitation power a significant blue shift of the photoluminescence signal occurs. This is attributed to a laser-induced demagnetization, i.e. the laser-generated carriers heat the Mn2+ spin system via spin-flip exchange scattering.

AB - The photoluminescene signal of individual semimagnetic CdSe/Zn 0.75Mn0.25Se quantum dots is used to study the magnetization of the Mn2+ spin system in the exchange field of a single exciton. We demonstrate that by increasing the laser excitation power a significant blue shift of the photoluminescence signal occurs. This is attributed to a laser-induced demagnetization, i.e. the laser-generated carriers heat the Mn2+ spin system via spin-flip exchange scattering.

KW - Diluted magnetic semiconductors

KW - Exciton magnetic polaron

KW - Nanomagnetism

KW - Quantum dots

KW - Spin heating

UR - http://www.scopus.com/inward/record.url?scp=3543126477&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:3543126477

VL - 16

SP - 379

EP - 382

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

SN - 1557-1939

IS - 2

ER -

Laser-controlled magnetization in a single magnetic semiconductor quantum dot

Abstract

Keywords

ASJC Scopus subject areas

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