Spatial control of carrier capture in two-dimensional materials: Beyond energy selection rules
Spatial control of carrier capture in two-dimensional materials: Beyond energy selection rules
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DOI：
10.1103/physrevb.98.195411
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发表时间：
2018-02
影响因子：
3.7
通讯作者：
R. Rosati;F. Lengers;D. Reiter;T. Kuhn
中科院分区：
文献类型：
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作者：
R. Rosati;F. Lengers;D. Reiter;T. Kuhn
© 2018美国物理学会。从二维过渡金属二硫属化物单层到准零维势的载流子捕获是开发这些卓越材料的决定性过程，例如，单光子源在这里，我们从理论上研究声子诱导的载流子捕获在MoSe 2单层使用Lindblad单粒子的方法。虽然捕获效率的一个决定性的控制参数是能量选择规则，它将进入的载流子的能量通过发射的声子连接到最终状态，我们表明，另外时空动力学起着至关重要的作用。通过改变入射载流子的方向相对于局域势的取向，我们引入了一种新的控制机制的载流子捕获：空间控制。
© 2018 American Physical Society. The carrier capture from a two-dimensional transition metal dichalcogenide monolayer into a quasi-zero-dimensional potential is a decisive process to exploit these remarkable materials as, e.g., single-photon sources. Here, we study theoretically the phonon-induced carrier capture in a MoSe2 monolayer using a Lindblad single-particle approach. Although one decisive control parameter of the capture efficiency is the energy selection rule, which links the energy of the incoming carriers to that of the final state via the emitted phonon, we show that additionally the spatiotemporal dynamics plays a crucial role. By varying the direction of the incoming carriers with respect to the orientation of the localized potential, we introduce a new control mechanism for the carrier capture: the spatial control.