【摘 要】
：
Quantum geometric tensor,including a symmetric real part defined as quantum metric and an antisymmetric part defined as Berry curvature,is essential for understanding many phenomena.In this study,we investigated the photogalvanic effect of semicon-ductors
【机 构】
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MIIT Key Laboratory of Advanced Display Materials and Devices,Ministry of Industry and Information T
【出 处】
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中国科学：物理学 力学 天文学（英文版）
论文部分内容阅读
Quantum geometric tensor,including a symmetric real part defined as quantum metric and an antisymmetric part defined as Berry curvature,is essential for understanding many phenomena.In this study,we investigated the photogalvanic effect of semicon-ductors with time-reversal-invariant and spatial inversion symmetries using the quantum kinetic equation.We concluded that the integral of the symmetric(antisymmetric)part of quantum geometric tensor on the equal energy surface in momentum space,sat-isfying the resonance condition,is related to the generation rate of carriers in semiconductors under linearly(circularly)polarized light.Under additional bias voltage,the dc photocurrent is proportional to the bias voltage.Our study provided an alternative in-terpretation for the photogalvanic effect in the view of quantum geometric tensor.Additionally,it classified the intrinsic difference between linearly and circularly polarized optical fields.
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