Mapping of the dark exciton landscape in transition metal dichalcogenides

被引：60

作者：

Berghauser, Gunnar ^{[1
]}

Steinleitner, Philipp ^{[2
]}

Merkl, Philipp ^{[2
]}

Huber, Rupert ^{[2
]}

Knorr, Andreas ^{[3
]}

Malic, Ermin ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden

[2] Univ Regensburg, Dept Phys, D-93040 Regensburg, Germany

[3] Tech Univ Berlin, Inst Theoret Phys, D-10623 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2018年 / 98卷 / 02期

基金：

瑞典研究理事会; 欧盟地平线“2020”;

关键词：

MONOLAYER; SEMICONDUCTOR;

D O I：

10.1103/PhysRevB.98.020301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Transition metal dichalcogenides (TMDs) exhibit a remarkable exciton physics including bright and optically forbidden dark excitonic states. Here, we show how dark excitons can be experimentally revealed by probing the intraexcitonic 1s-2p transition. Distinguishing the optical response shortly after the excitation and after the exciton thermalization allows us to reveal the relative position of bright and dark excitons. We find both in theory and experiment a clear blueshift in the optical response demonstrating the transition of bright exciton populations into lower-lying dark excitonic states.

引用

页数：6

共 46 条

[1]

Andor K., 2015, 2D MATER, V2

[2] Analytical approach to excitonic properties of MoS2 [J].

Berghaeuser, Gunnar ;

Malic, Ermin .

PHYSICAL REVIEW B, 2014, 89 (12)

[3] Optical fingerprint of dark 2p-states in transition metal dichalcogenides [J].

Berghauser, Gunnar ;

Knorr, Andreas ;

Malic, Ermin .

2D MATERIALS, 2017, 4 (01)

[4] Bright and dark singlet excitons via linear and two-photon spectroscopy in monolayer transition-metal dichalcogenides [J].

Berkelbach, Timothy C. ;

Hybertsen, Mark S. ;

Reichman, David R. .

PHYSICAL REVIEW B, 2015, 92 (08)

[5] Theory of neutral and charged excitons in monolayer transition metal dichalcogenides [J].

Berkelbach, Timothy C. ;

Hybertsen, Mark S. ;

Reichman, David R. .

PHYSICAL REVIEW B, 2013, 88 (04)

[6] Exciton Relaxation Cascade in two-dimensional Transition Metal Dichalcogenides [J].

Brem, Samuel ;

Selig, Malte ;

Berghaeuser, Gunnar ;

Malic, Ermin .

SCIENTIFIC REPORTS, 2018, 8

[7] Isolation and characterization of few-layer black phosphorus [J].

Castellanos-Gomez, Andres ;

Vicarelli, Leonardo ;

Prada, Elsa ;

Island, Joshua O. ;

Narasimha-Acharya, K. L. ;

Blanter, Sofya I. ;

Groenendijk, Dirk J. ;

Buscema, Michele ;

Steele, Gary A. ;

Alvarez, J. V. ;

Zandbergen, Henny W. ;

Palacios, J. J. ;

van der Zant, Herre S. J. .

2D MATERIALS, 2014, 1 (02)

[8] Electrical Tuning of Exciton Binding Energies in Monolayer WS2 [J].

Chernikov, Alexey ;

van der Zande, Arend M. ;

Hill, Heather M. ;

Rigosi, Albert F. ;

Velauthapillai, Ajanth ;

Hone, James ;

Heinz, Tony F. .

PHYSICAL REVIEW LETTERS, 2015, 115 (12)

[9] Exciton Binding Energy and Nonhydrogenic Rydberg Series in Monolayer WS2 [J].

Chernikov, Alexey ;

Berkelbach, Timothy C. ;

Hill, Heather M. ;

Rigosi, Albert ;

Li, Yilei ;

Aslan, Ozgur Burak ;

Reichman, David R. ;

Hybertsen, Mark S. ;

Heinz, Tony F. .

PHYSICAL REVIEW LETTERS, 2014, 113 (07)

[10] Plasmon dispersion in layered transition-metal dichalcogenides [J].

Cudazzo, Pierluigi ;

Gatti, Matteo ;

Rubio, Angel .

PHYSICAL REVIEW B, 2012, 86 (07)

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