Результаты исследований: Научные публикации в периодических изданиях › статья
Electron and hole spins in InP/(Ga,In)P self-assembled quantum dots. / Syperek, M.; Yakovlev, D.R.; Yugova, I.A.; Misiewicz, J.; Jetter, M.; Schulz, M.; Michler, P.; Bayer, M.
в: Physical Review B - Condensed Matter and Materials Physics, Том 86, № 12, 2012, стр. 125320_1-6.Результаты исследований: Научные публикации в периодических изданиях › статья
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TY - JOUR
T1 - Electron and hole spins in InP/(Ga,In)P self-assembled quantum dots
AU - Syperek, M.
AU - Yakovlev, D.R.
AU - Yugova, I.A.
AU - Misiewicz, J.
AU - Jetter, M.
AU - Schulz, M.
AU - Michler, P.
AU - Bayer, M.
PY - 2012
Y1 - 2012
N2 - The properties of electron and hole spins in InP/(Ga,In)P self-assembled quantum dots are studied through their coherent dynamics using time-resolved Kerr rotation. From these studies information about the g factor and dephasing of the spin excitations is extracted. The electron spin shows a behavior similar to that of electron spins in quantum dots of different material: The g factor is isotropic in the dot plane and with increasing applied magnetic field the spin dephasing accelerates due to variations in the dot ensemble. On the other hand, the hole spin demonstrates a behavior different from other dot systems. Namely, the signal decay on a time scale of about 100 ps does not depend on magnetic field, and the g factor is isotropic in the dot plane. These findings underline previous suggestions that only the electrons are well localized in the InP/(Ga,In)P quantum dots, while the holes are weakly confined and carry bulklike character.
AB - The properties of electron and hole spins in InP/(Ga,In)P self-assembled quantum dots are studied through their coherent dynamics using time-resolved Kerr rotation. From these studies information about the g factor and dephasing of the spin excitations is extracted. The electron spin shows a behavior similar to that of electron spins in quantum dots of different material: The g factor is isotropic in the dot plane and with increasing applied magnetic field the spin dephasing accelerates due to variations in the dot ensemble. On the other hand, the hole spin demonstrates a behavior different from other dot systems. Namely, the signal decay on a time scale of about 100 ps does not depend on magnetic field, and the g factor is isotropic in the dot plane. These findings underline previous suggestions that only the electrons are well localized in the InP/(Ga,In)P quantum dots, while the holes are weakly confined and carry bulklike character.
U2 - 10.1103/PhysRevB.86.125320
DO - 10.1103/PhysRevB.86.125320
M3 - Article
VL - 86
SP - 125320_1-6
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 12
ER -
ID: 5402127