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 language | English |
|---|---|
| Article number | 195320 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 82 |
| Issue number | 19 |
| DOIs | |
| State | Published - Nov 18 2010 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
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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 journal › Article
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TY - JOUR
T1 - Robust magnetic polarons in type-II (Zn,Mn)Te/ZnSe magnetic quantum dots
AU - Sellers, I. R.
AU - Oszwałdowski, R.
AU - Whiteside, V. R.
AU - Eginligil, M.
AU - Petrou, A.
AU - Zutic, I.
AU - Chou, W. C.
AU - Fan, W. C.
AU - Petukhov, A. G.
AU - Kim, Sung Jin
AU - Cartwright, A. N.
AU - McCombe, B. D.
PY - 2010/11/18
Y1 - 2010/11/18
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.82.195320
DO - 10.1103/PhysRevB.82.195320
M3 - Article
AN - SCOPUS:78649721533
VL - 82
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 19
M1 - 195320
ER -