拓扑绝缘体中螺旋狄拉克费米子的超快动力学

IF 7.7 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Y. Bai, Na Li, Ruxin Li, P. Liu
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引用次数: 3

摘要

摘要三维拓扑绝缘体具有非常规的二维表面态,其中的载流子是螺旋狄拉克费米子,并受到反向散射的保护。因此,它们在照射超短和强激光时表现出新颖的电子响应。我们简要回顾了最近对拓扑绝缘体表面超快现象的研究,这些现象是由可见光到太赫兹频率的激光脉冲驱动的。狄拉克费米子的超快动力学可以由螺旋光子激发,并由强光场驱动。已经证明了许多独特的非线性行为,如螺旋度相关光电流的激发、Floquet-Bloch带的形成、光波驱动的Dirac电流和光学高次谐波发射的产生。这篇综述旨在了解拓扑表面态中超快电荷和自旋动力学的微观机制及其在激光相干操纵狄拉克费米子方面的前景。图形摘要
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ultrafast dynamics of helical Dirac fermions in the topological insulators
ABSTRACT Three-dimensional topological insulators feature unconventional two-dimensional surface states, the carriers in which are helical Dirac fermions and protected from backscattering. Thus, they exhibit novel electronic response upon illuminate ultrashort and intense laser light. We briefly reviewed recent studies on ultrafast phenomena from the surface of the topological insulators driven by laser pulse ranging from visible to THz frequency. Ultrafast dynamics of Dirac fermions can be excited by helical photons and driven by strong light field. Many unique nonlinear behaviors have been demonstrated, such as the excitation of helicity-dependent photocurrent, the formation of Floquet-Bloch bands, lightwave-driven Dirac currents and the generation of optical high-harmonic emission. This review aimed at understanding the microscopic mechanism of the ultrafast charge and spin dynamics in topological surface states and its prospects for coherent manipulation of Dirac fermions by laser light. GRAPHICAL ABSTRACT
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来源期刊
Advances in Physics: X
Advances in Physics: X Physics and Astronomy-General Physics and Astronomy
CiteScore
13.60
自引率
0.00%
发文量
37
审稿时长
13 weeks
期刊介绍: Advances in Physics: X is a fully open-access journal that promotes the centrality of physics and physical measurement to modern science and technology. Advances in Physics: X aims to demonstrate the interconnectivity of physics, meaning the intellectual relationships that exist between one branch of physics and another, as well as the influence of physics across (hence the “X”) traditional boundaries into other disciplines including: Chemistry Materials Science Engineering Biology Medicine
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