TY - JOUR
T1 - Circular Polarization Dynamics during Magnetic Polaron Formation in Type-II Magnetic Quantum Dots
AU - Barman, Biplob
AU - Pientka, James M.
AU - Murphy, Joseph R.
AU - Cartwright, Alexander N.
AU - Chou, Wu Ching
AU - Fan, Wen Chung
AU - Oszwałdowski, Rafal
AU - Petrou, Athos
PY - 2020/6/11
Y1 - 2020/6/11
N2 - We used time-resolved photoluminescence spectroscopy to study the circular polarization dynamics of magnetic polarons in type-II (Zn,Mn)Te/ZnSe quantum dots in the presence of an external magnetic field. We investigated the time evolution of the peak energy of the σ+ and σ- circularly polarized photoluminescence components and of the circular polarization of the emitted light. We also observed that the value of circular polarization, at long delay times, increases with magnetic field. We found that this system exhibits unexpected characteristics, such as different time scales for the formation of the magnetic polaron, on the one hand, and the evolution of photoluminescence circular polarization, on the other hand. These results are discussed within the framework of a theoretical model developed to describe the dependence of magnetic susceptibility as a function of temperature.
AB - We used time-resolved photoluminescence spectroscopy to study the circular polarization dynamics of magnetic polarons in type-II (Zn,Mn)Te/ZnSe quantum dots in the presence of an external magnetic field. We investigated the time evolution of the peak energy of the σ+ and σ- circularly polarized photoluminescence components and of the circular polarization of the emitted light. We also observed that the value of circular polarization, at long delay times, increases with magnetic field. We found that this system exhibits unexpected characteristics, such as different time scales for the formation of the magnetic polaron, on the one hand, and the evolution of photoluminescence circular polarization, on the other hand. These results are discussed within the framework of a theoretical model developed to describe the dependence of magnetic susceptibility as a function of temperature.
UR - http://www.scopus.com/inward/record.url?scp=85087828404&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.0c02723
DO - 10.1021/acs.jpcc.0c02723
M3 - Article
AN - SCOPUS:85087828404
VL - 124
SP - 12766
EP - 12773
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 23
ER -