Dynamical spin response in semimagnetic quantum dots.
Dynamical spin response in semimagnetic quantum dots.
复制标题
半磁性量子点的动态自旋响应。
DOI：
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发表时间：
2001
影响因子：
8.6
通讯作者：
J. Furdyna
中科院分区：
文献类型：
--
作者：
J. Seufert;G. Bacher;M. Scheibner;A. Forchel;Sang Hoon Lee;M. Dobrowolska;J. Furdyna
利用时间分辨光谱研究了半导体量子点中顺磁自旋系统对准零维电子-空穴对交换场的动力学响应。自旋响应时间提取的瞬态光谱位移的光致发光信号所造成的动态自旋排列的磁性离子纳入晶体基质。这种铁磁性排列的自旋复合物的形成被证明是令人惊讶的稳定相比，散装系统，即使在高温和高的外部磁场。
The dynamical response of a paramagnetic spin system to the exchange field of quasi-zero-dimensional electron-hole pairs in semiconductor quantum dots is investigated by time-resolved spectroscopy. The spin response time is extracted from the transient spectral shift of the photoluminescence signal caused by the dynamical spin alignment of magnetic ions incorporated in the crystal matrix. The formation of this ferromagnetically aligned spin complex is demonstrated to be surprisingly stable as compared to bulk systems, even at elevated temperatures and high external magnetic fields.