Changes in the Optical Absorption Coefficient and Refractive Index of Monolayer Germanene in the Magnetic Field

IF 0.7 4区 物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY
Do Muoi
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引用次数: 0

Abstract

In this study, we conduct a theoretical analysis of the optical absorption coefficients (OACs) and refractive index changes (RICs) arising from intraband and interband transitions in monolayer germanene under the influence of a magnetic field. The findings reveal that both OACs and RICs blueshift as the magnetic field strength increases. Notably, the peaks associated with spin-up states consistently appear to the right of those corresponding to spin-down states. This distinction in peak positions is attributed to the strong spin–orbit coupling (SOC) characteristic of monolayer germanene. For intraband transitions, the OACs and RICs exhibit a single peak in the terahertz (THz) region. Moreover, interband transitions give rise to multiple peaks, spanning from the high THz range to the low far-infrared range, underscoring the promising potential of monolayer germanene for optoelectronic applications.

Abstract Image

磁场作用下单层锗烯光吸收系数和折射率的变化
在这项研究中,我们对磁场影响下单层锗烯的带内和带间跃迁引起的光学吸收系数(OACs)和折射率变化(RICs)进行了理论分析。研究结果表明,随着磁场强度的增加,oac和RICs都发生蓝移。值得注意的是,与自旋向上状态相关的峰始终出现在自旋向下状态对应的峰的右侧。这种峰位的差异归因于单层锗烯的强自旋-轨道耦合(SOC)特性。对于带内跃迁,oac和RICs在太赫兹(THz)区域呈现单峰。此外,带间跃迁会产生多个峰,从高太赫兹范围到低远红外范围,强调了单层锗烯在光电应用中的潜力。
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来源期刊
Bulletin of the Lebedev Physics Institute
Bulletin of the Lebedev Physics Institute PHYSICS, MULTIDISCIPLINARY-
CiteScore
0.70
自引率
25.00%
发文量
41
审稿时长
6-12 weeks
期刊介绍: Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.
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