Infrared to terahertz optical conductivity of n -type and p -type monolayer MoS 2 in the presence of Rashba spin-orbit coupling
Infrared to terahertz optical conductivity of n -type and p -type monolayer MoS 2 in the presence of Rashba spin-orbit coupling
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DOI：
10.1103/physrevb.94.155432
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发表时间：
2016-10
影响因子：
3.7
通讯作者：
Y. M. Xiao;W. Xu;B. V. Duppen;F. Peeters
中科院分区：
文献类型：
--
作者：
Y. M. Xiao;W. Xu;B. V. Duppen;F. Peeters
研究了Rashba自旋轨道耦合效应对n$型和p$型单层膜${\mathrm{MoS}}_{2}$光电性质的影响。在Kubo形式主义内计算光学电导率。我们发现，自旋翻转跃迁启用的Rashba SOC导致在光谱中的宽吸收窗口。此外，我们还评估了辐射偏振方向、温度、载流子密度和Rashba自旋轨道参数强度对电导率的影响。我们发现，吸收峰或吸收窗口的位置，宽度和形状可以通过改变这些参数进行调谐。这项研究表明，单层${\mathrm{MoS}}_{2}$可以是一个有前途的可调谐的光学和光电材料，是积极的在红外太赫兹光谱范围。
We investigate the effect of Rashba spin-orbit coupling (SOC) on the optoelectronic properties of $n$- and $p$-type monolayer ${\mathrm{MoS}}_{2}$. The optical conductivity is calculated within the Kubo formalism. We find that the spin-flip transitions enabled by the Rashba SOC result in a wide absorption window in the optical spectrum. Furthermore, we evaluate the effects of the polarization direction of the radiation, temperature, carrier density, and the strength of the Rashba spin-orbit parameter on the optical conductivity. We find that the position, width, and shape of the absorption peak or absorption window can be tuned by varying these parameters. This study shows that monolayer ${\mathrm{MoS}}_{2}$ can be a promising tunable optical and optoelectronic material that is active in the infrared to terahertz spectral range.