Robust magnetic polarons in type-II (Zn,Mn)Te/ZnSe magnetic quantum dots

I. R. Sellers, R. Oszwałdowski, V. R. Whiteside, M. Eginligil, A. Petrou, I. Zutic, W. C. Chou, W. C. Fan, A. G. Petukhov, Sung Jin Kim, A. N. Cartwright, B. D. McCombe

Research output: Contribution to journalArticle

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Abstract

We present a magneto-optical study of magnetic polarons in type-II (Zn,Mn) Te quantum dots. The polarons are formed due to the exchange coupling between the spins of the holes and those of the Mn ions, both of which are localized in the dots. In our photoluminescence studies, the magnetic polarons are detected at temperatures up to ∼150 K, with a formation energy of ∼40 meV. The emission from these dots exhibits an unusually small Zeeman shift with applied magnetic field (∼2 meV at 8 T) and at the same time a very large circular polarization. We attribute this apparently contradictory behavior by a low and weakly temperature-dependent magnetic susceptibility due to antiferromagnetic coupling of the Mn spins.

Original languageEnglish
Article number195320
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number19
DOIs
StatePublished - Nov 18 2010
Externally publishedYes

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Polarons
polarons
Semiconductor quantum dots
quantum dots
Exchange coupling
Circular polarization
energy of formation
circular polarization
Magnetic susceptibility
Photoluminescence
Ions
Magnetic fields
magnetic permeability
photoluminescence
Temperature
temperature
shift
magnetic fields
ions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Sellers, I. R., Oszwałdowski, R., Whiteside, V. R., Eginligil, M., Petrou, A., Zutic, I., ... McCombe, B. D. (2010). Robust magnetic polarons in type-II (Zn,Mn)Te/ZnSe magnetic quantum dots. Physical Review B - Condensed Matter and Materials Physics, 82(19), [195320]. https://doi.org/10.1103/PhysRevB.82.195320

Robust magnetic polarons in type-II (Zn,Mn)Te/ZnSe magnetic quantum dots. / Sellers, I. R.; Oszwałdowski, R.; Whiteside, V. R.; Eginligil, M.; Petrou, A.; Zutic, I.; Chou, W. C.; Fan, W. C.; Petukhov, A. G.; Kim, Sung Jin; Cartwright, A. N.; McCombe, B. D.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 82, No. 19, 195320, 18.11.2010.

Research output: Contribution to journalArticle

Sellers, IR, Oszwałdowski, R, Whiteside, VR, Eginligil, M, Petrou, A, Zutic, I, Chou, WC, Fan, WC, Petukhov, AG, Kim, SJ, Cartwright, AN & McCombe, BD 2010, 'Robust magnetic polarons in type-II (Zn,Mn)Te/ZnSe magnetic quantum dots', Physical Review B - Condensed Matter and Materials Physics, vol. 82, no. 19, 195320. https://doi.org/10.1103/PhysRevB.82.195320
Sellers, I. R. ; Oszwałdowski, R. ; Whiteside, V. R. ; Eginligil, M. ; Petrou, A. ; Zutic, I. ; Chou, W. C. ; Fan, W. C. ; Petukhov, A. G. ; Kim, Sung Jin ; Cartwright, A. N. ; McCombe, B. D. / Robust magnetic polarons in type-II (Zn,Mn)Te/ZnSe magnetic quantum dots. In: Physical Review B - Condensed Matter and Materials Physics. 2010 ; Vol. 82, No. 19.
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