Longitudinal and transverse fluctuations of magnetization of the excitonic magnetic polaron in a semimagnetic single quantum dot

P. S. Dorozhkin, A. V. Chernenko, V. D. Kulakovskii, A. S. Brichkin, A. A. Maksimov, H. Schoemig, G. Bacher, A. Forchel, Sang Hoon Lee, M. Dobrowolska, J. K. Furdyna

Research output: Contribution to journalArticle

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Abstract

Statistical fluctuations of the magnetization on a nanometer scale have been investigated with the use of magneto-optical spectroscopy of quasi-zero-dimensional excitonic magnetic polarons (EMP) in individual pancake-shaped CdSe/ZnMnSe quantum dots (QD's). The EMP emission line demonstrates a qualitatively different behavior in magnetic field B normal and parallel to the QD plane. In the first case, the alignment of the Mn spins in high magnetic fields results in a giant Zeeman shift and linewidth narrowing of almost one order of magnitude to values characteristic of nonmagnetic QD's. No similar effects are observed in the second case where the emission line demonstrates a weak blue shift and small linewidth variation. It is shown that the difference originates from the anisotropy of the hole exchange field in the QD's and can be described using the fundamental fluctuation-dissipation theorem and taking into account the anisotropy of the hole g factor. Both the longitudinal and transverse fluctuations of the magnetization are determined from the analysis of EMP emission lines recorded in the two directions of magnetic field B. We demonstrate that in high magnetic fields the longitudinal fluctuations decrease exponentially whereas the transverse ones decrease as 1/B.

Original languageEnglish
Article number195313
Pages (from-to)1953131-1953138
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number19
Publication statusPublished - 2003 Nov 1
Externally publishedYes

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Gene Conversion
Polarons
Semiconductor quantum dots
Magnetization
quantum dots
Magnetic fields
polarons
magnetization
Linewidth
Anisotropy
magnetic fields
anisotropy
blue shift
dissipation
theorems
alignment
shift
spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Dorozhkin, P. S., Chernenko, A. V., Kulakovskii, V. D., Brichkin, A. S., Maksimov, A. A., Schoemig, H., ... Furdyna, J. K. (2003). Longitudinal and transverse fluctuations of magnetization of the excitonic magnetic polaron in a semimagnetic single quantum dot. Physical Review B - Condensed Matter and Materials Physics, 68(19), 1953131-1953138. [195313].

Longitudinal and transverse fluctuations of magnetization of the excitonic magnetic polaron in a semimagnetic single quantum dot. / Dorozhkin, P. S.; Chernenko, A. V.; Kulakovskii, V. D.; Brichkin, A. S.; Maksimov, A. A.; Schoemig, H.; Bacher, G.; Forchel, A.; Lee, Sang Hoon; Dobrowolska, M.; Furdyna, J. K.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 68, No. 19, 195313, 01.11.2003, p. 1953131-1953138.

Research output: Contribution to journalArticle

Dorozhkin, PS, Chernenko, AV, Kulakovskii, VD, Brichkin, AS, Maksimov, AA, Schoemig, H, Bacher, G, Forchel, A, Lee, SH, Dobrowolska, M & Furdyna, JK 2003, 'Longitudinal and transverse fluctuations of magnetization of the excitonic magnetic polaron in a semimagnetic single quantum dot', Physical Review B - Condensed Matter and Materials Physics, vol. 68, no. 19, 195313, pp. 1953131-1953138.
Dorozhkin PS, Chernenko AV, Kulakovskii VD, Brichkin AS, Maksimov AA, Schoemig H et al. Longitudinal and transverse fluctuations of magnetization of the excitonic magnetic polaron in a semimagnetic single quantum dot. Physical Review B - Condensed Matter and Materials Physics. 2003 Nov 1;68(19):1953131-1953138. 195313.
Dorozhkin, P. S. ; Chernenko, A. V. ; Kulakovskii, V. D. ; Brichkin, A. S. ; Maksimov, A. A. ; Schoemig, H. ; Bacher, G. ; Forchel, A. ; Lee, Sang Hoon ; Dobrowolska, M. ; Furdyna, J. K. / Longitudinal and transverse fluctuations of magnetization of the excitonic magnetic polaron in a semimagnetic single quantum dot. In: Physical Review B - Condensed Matter and Materials Physics. 2003 ; Vol. 68, No. 19. pp. 1953131-1953138.
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