PICOSECOND DYNAMICS OF MAGNETIC POLARONS GOVERNED BY ENERGY TRANSFER TO THE ZEEMAN RESERVOIR
PICOSECOND DYNAMICS OF MAGNETIC POLARONS GOVERNED BY ENERGY TRANSFER TO THE ZEEMAN RESERVOIR
复制标题
由能量转移到塞曼储层控制的磁极化子的皮秒动力学
DOI：
10.1103/physrevb.56.9782
复制
发表时间：
1997
影响因子：
3.7
通讯作者：
G. Landwehr
中科院分区：
文献类型：
--
作者：
D. Yakovlev;K. Kavokin;I. Merkulov;G. Mackh;W. Ossau;R. Hellmann;E. Göbel;A. Waag;G. Landwehr
我们提出了一种在外部磁场中半磁性量子阱中磁极化子形成的机制，其特征在于能量从载流子磁性离子交换储存库转移到塞曼储存库。该机制与重空穴态自旋结构引起的各向异性交换相互作用有关。极化子的形成是由激子体积内磁离子总自旋在外部场和交换场的总和中的进动决定的，并且发生在大约 10 ps 的短时间内。在实验上，这种机制在光致发光光谱中表现为平行于量子阱平面施加的磁场中磁极化子位移的增加。
We suggest a mechanism of magnetic polaron formation in semimagnetic quantum wells in external magnetic fields, which is characterized by a transfer of energy from the carrier–magnetic-ions exchange reservoir to the Zeeman reservoir. This mechanism is related to the anisotropic exchange interaction due to the spin structure of the heavy-hole state. The polaron formation is determined by a precession of a total spin of magnetic ions inside the exciton volume in the sum of external and exchange field and happens inside the short time of about 10 ps. Experimentally, this mechanism manifests itself in photoluminescence spectra as an increase of the magnetic polaron shift at magnetic fields applied parallel to the quantum-well plane.