Trion confinement and exciton shrinkage in the 2DEG at high magnetic fields

Bellani, V.; Rossella, Francesco; Dionigi, Fabio; Goiran, M.; George, Sylvie; Biasiol, G.; Sorba, L.

doi:10.1016/j.ssc.2012.04.006

Cited by 2 publications

(2 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such three-particle states are known as trions and can be either positive (X + ) or negative (X − ) depending on whether an additional hole or electron is bound, respectively. Since the first prediction of trions in bulk semiconductors 29 , there have been many theoretical 12,13,30 and experimental 2,14,[31][32][33] studies on these excitonic structures in different systems such as e.g. semiconductor quantum wells (for example see Refs.…”

Section: Introductionmentioning

confidence: 99%

Excitons, trions, and biexcitons in transition-metal dichalcogenides: Magnetic-field dependence

2018

View full text Add to dashboard Cite

The influence of a perpendicular magnetic field on the binding energy and structural properties of excitons, trions, and biexcitons in monolayers of semiconducting transition metal dichalcogenides (TMDs) is investigated. The stochastic variational method (SVM) with a correlated Gaussian basis is used to calculate the different properties of these few-particle systems. In addition, we present a simplified variational approach which supports the SVM results for excitons as a function of magnetic field. The exciton diamagnetic shift is compared with recent experimental results and we extend this concept to trions and biexcitons. The effect of a local potential fluctuation, which we model by a circular potential well, on the binding energy of trions and biexcitons is investigated and found to significantly increase the binding of those excitonic complexes. arXiv:1805.02610v1 [cond-mat.mes-hall]

show abstract

Section: Introductionmentioning

confidence: 99%

Excitons, trions, and biexcitons in transition-metal dichalcogenides: Magnetic-field dependence

2018

View full text Add to dashboard Cite

show abstract

“…Trions are charged excitons that consist of an electron (e) or a hole (h) bound to an exciton (X). Since the first prediction of the existence of two kinds of trions (X + and X − ) in bulk semiconductors in 1958 24 , there have been many theoretical 13,14,25 and experimental 4,15,[26][27][28] studies on trions in different systems such as e.g. semiconductor quantum wells (for example see Refs.…”

Section: Introductionmentioning

confidence: 99%

Excitons and trions in monolayer transition metal dichalcogenides: A comparative study between the multiband model and the quadratic single-band model

2017

View full text Add to dashboard Cite

The electronic and structural properties of excitons and trions in monolayer transition metal dichalcogenides are investigated using both a multi-band and a single-band model. In the multiband model we construct the excitonic Hamiltonian in the product base of the single-particle states at the conduction and valence band edges. We decouple the corresponding energy eigenvalue equation and solve the resulting differential equation self-consistently, using the finite element method (FEM), to determine the energy eigenvalues and the wave functions. As a comparison, we also consider the simple single-band model which is often used in numerical studies. We solve the energy eigenvalue equation using the FEM as well as with the stochastic variational method (SVM) in which a variational wave function is expanded in a basis of a large number of correlated Gaussians. We find good agreement between the results of both methods as well as with other theoretical works for excitons and we also compare with available experimental data. For trions the agreement between both methods is not as good due to our neglect of angular correlations when using the FEM. Finally, when comparing the two models, we see that the presence of the valence bands in the muti-band model leads to differences with the single-band model when (interband) interactions are strong.

show abstract

Trion confinement and exciton shrinkage in the 2DEG at high magnetic fields

Cited by 2 publications

References 38 publications

Excitons, trions, and biexcitons in transition-metal dichalcogenides: Magnetic-field dependence

Excitons, trions, and biexcitons in transition-metal dichalcogenides: Magnetic-field dependence

Excitons and trions in monolayer transition metal dichalcogenides: A comparative study between the multiband model and the quadratic single-band model

Contact Info

Product

Resources

About