ENHANCED SPIN INTERACTIONS IN DIGITAL MAGNETIC HETEROSTRUCTURES
ENHANCED SPIN INTERACTIONS IN DIGITAL MAGNETIC HETEROSTRUCTURES
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DOI：
10.1103/physrevlett.75.505
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发表时间：
1995-07-17
影响因子：
8.6
通讯作者：
SAMARTH, N
中科院分区：
文献类型：
--
作者：
CROOKER, SA;TULCHINSKY, DA;SAMARTH, N
提出了一种新的异质结构，其中磁性离子的分数单层被“数字化”地引入半导体量子阱中。在二维（2D）平面内的重排矩提供了对它们的相互作用的额外控制，产生了可调谐的两能级电子系统，其中自旋分裂明显大于适度磁场中的非均匀线宽。飞秒分辨的电子和磁性光谱揭示自旋翻转散射只依赖于塞曼能量，但不依赖于当地的磁环境，和长寿命的动态磁化。
A new heterostructure is developed in which fractional monolayers of magnetic ions are introduced ''digitally'' within a semiconductor quantum well. Rearranging moments within two-dimensional (2D) planes provides additional control over their interactions, yielding tunable two-level electronic systems in which spin splittings are significantly larger than inhomogeneous linewidths in modest magnetic fields. Femtosecond-resolved electronic and magnetic spectroscopies reveal spin-flip scattering dependent only on the Zeeman energy but not the local magnetic environment, and long-lived dynamic magnetizations.