Interplay of spin and orbital magnetogyrotropic photogalvanic effects in InSb/(Al,In)Sb quantum well structures
Interplay of spin and orbital magnetogyrotropic photogalvanic effects in InSb/(Al,In)Sb quantum well structures
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DOI：
10.1103/physrevb.85.045305
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发表时间：
2011-12
影响因子：
3.7
通讯作者：
S. Stachel;P. Olbrich;C. Zoth;U. Hagner;T. Stangl;C. Karl;P. Lutz;V. Bel'kov;S. Clowes;
中科院分区：
文献类型：
--
作者：
S. Stachel;P. Olbrich;C. Zoth;U. Hagner;T. Stangl;C. Karl;P. Lutz;V. Bel'kov;S. Clowes;
本文报道了InSb/（Al，In）Sb量子阱结构中线性和圆形磁旋光电流效应的观测结果。我们表明，带内（德鲁德型）吸收的太赫兹辐射的异质结构中的直流电流的存在下，在一个平面内的磁场。研究了光电流随磁场强度、温度和波长的变化规律。我们发现，在中等磁场下，光电流表现出典型的线性场依赖性。然而，在高磁场下，它变得非线性并反转其符号。实验结果进行了分析的微观模型的基础上的非对称弛豫的载流子在动量空间。我们表明，所观察到的光电流的非线性是由大塞曼自旋分裂InSb/（Al，In）Sb结构和相互作用的自旋相关和自旋无关的根的磁致旋光电流效应。
We report on the observation of linear and circular magnetogyrotropic photogalvanic effects in InSb/(Al,In)Sb quantum well structures. We show that intraband (Drude-type) absorption of terahertz radiation in the heterostructures causes a dc electric current in the presence of an in-plane magnetic field. The photocurrent behavior upon variation of the magnetic field strength, temperature, and wavelength is studied. We show that at moderate magnetic fields, the photocurrent exhibits a typical linear field dependence. At high magnetic fields, however, it becomes nonlinear and inverses its sign. The experimental results are analyzed in terms of the microscopic models based on asymmetric relaxation of carriers in the momentum space. We demonstrate that the observed nonlinearity of the photocurrent is caused by the large Zeeman spin splitting in InSb/(Al,In)Sb structures and an interplay of the spin-related and spin-independent roots of the magnetogyrotropic photogalvanic effect.