Theory of neutral and charged excitons in monolayer transition metal dichalcogenides

被引：771

作者：

Berkelbach, Timothy C. ^{[1
]}

Hybertsen, Mark S. ^{[2
]}

Reichman, David R. ^{[1
]}

机构：

[1] Columbia Univ, Dept Chem, New York, NY 10027 USA

[2] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 04期

关键词：

2-DIMENSIONAL ELECTRON-GAS; VALLEY POLARIZATION; OPTICAL-PROPERTIES; QUASI-PARTICLE; SEMICONDUCTOR; MOS2; ABSORPTION; PHOTOLUMINESCENCE; SPECTRA; TRIONS;

D O I：

10.1103/PhysRevB.88.045318

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a microscopic theory of neutral excitons and charged excitons (trions) in monolayers of transition metal dichalcogenides, including molybdenum disulfide. Our theory is based on an effective mass model of excitons and trions, parameterized by ab initio calculations and incorporating a proper treatment of screening in two dimensions. The calculated exciton binding energies are in good agreement with high-level many-body computations based on the Bethe-Salpeter equation. Furthermore, our calculations for the more complex trion species compare very favorably with recent experimental measurements and provide atomistic insight into the microscopic features which determine the trion binding energy.

引用

页数：6

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