论文标题
低损坏的二维等离子体模式
Low-loss two-dimensional plasmon modes in antimonene
论文作者
论文摘要
使用密度功能和多体扰动理论研究了自旋轨道（SOC）和电子偶联对掺杂单层SB $ _2 $集体激发的影响。自旋轨道耦合对于单层SB $ _2 $非常重要，并且导致电子带结构的重建。尤其是，单层SB $ _2 $的等离子体模式对SOC非常敏感，其特征是由于小型电子散射而导致的阻尼速率非常低。我们的结果表明，与单层石墨烯相比，当等离子体能量为$ \ hbarω> 0.2 $ eV时，偶然中的等离子的阻尼明显较小，这是由于先前材料中的等离子体phon-phonon耦合而导致的。
The effects of spin-orbit (SOC) and electron-phonon coupling on the collective excitation of doped monolayer Sb$_2$ are investigated using density functional and many-body perturbation theories. The spin-orbit coupling is exclusively important for the monolayer Sb$_2$ and it leads to the reconstruction of the electronic band structure. In particular, plasmon modes of monolayer Sb$_2$ are quite sensitive to the SOC and are characterized by very low damping rates owing to small electron-phonon scatterings. Our results show plasmons in antimonene are significantly less damped compared to monolayer graphene when plasmon energies are $\hbar ω> 0.2$ eV due to smaller plasmon-phonon coupling in the former material.
