Trion formation dynamics in monolayer transition metal dichalcogenides
Journal article, 2016

We report charged exciton (trion) formation dynamics in doped monolayer transition metal dichalcogenides, specifically molybdenum diselenide (MoSe2), using resonant two-color pump-probe spectroscopy. When resonantly pumping the exciton transition, trions are generated on a picosecond time scale through exciton-electron interaction. As the pump energy is tuned from the high energy to low energy side of the inhomogeneously broadened exciton resonance, the trion formation time increases by ∼50%. This feature can be explained by the existence of both localized and delocalized excitons in a disordered potential and suggests the existence of an exciton mobility edge in transition metal dichalcogenides.

Author

A. Singh

The University of Texas at Austin

G. Moody

The University of Texas at Austin

K. Tran

The University of Texas at Austin

M.E. Scott

University of Washington

V. Overbeck

Technische Universität Berlin

Gunnar Berghäuser

Technische Universität Berlin

J. Schaibley

University of Washington

E.J. Seifert

The University of Texas at Austin

D. Pleskot

University of California

N.M. Gabor

University of California

J. Yan

University of Tennessee

Oak Ridge National Laboratory

D.G. Mandrus

University of Tennessee

Oak Ridge National Laboratory

M. Richter

Technische Universität Berlin

Ermin Malic

Chalmers, Physics, Condensed Matter Theory

X. Xu

University of Washington

X. Li

The University of Texas at Austin

Physical Review B

24699950 (ISSN) 24699969 (eISSN)

Vol. 93 4 041401

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

European Commission (FP7), 2013-10-01 -- 2016-03-31.

Subject Categories

Condensed Matter Physics

DOI

10.1103/PhysRevB.93.041401

More information

Latest update

11/6/2018