Coupling of plasmon and dipolar modes in a monolayer of MoS2

被引：3
|
作者：
Losic, Zeljana Bonacic [1 ]
机构：
[1] Univ Split, Fac Sci, Dept Phys, Split 21000, Croatia
来源：
MODERN PHYSICS LETTERS B | 2014年 / 28卷 / 12期
关键词：
Dielectric function; plasmon; dipolar mode;
D O I：
10.1142/S0217984914500997
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The dielectric function of a monolayer of molybdenum disulfide is investigated within the model of two-band metal using the random phase approximation (RPA). The large direct bandgap in a monolayer of MoS2 leads to the appearance of the interband dipolar mode which couples to the intraband plasmon mode. This results in two hybridized modes. The renormalized dipolar mode is close to its bare value, while coupling suppresses the plasmon mode. The obtained modes are responsible for the appearance of dispersing peaks in the energy-loss function.
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页数：9
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