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

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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.}",

year = "2003",

language = "English",

volume = "16",

pages = "379--382",

journal = "Journal of Superconductivity and Novel Magnetism",

issn = "1557-1939",

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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.

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

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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

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