Numerical Investigation of Triexciton Stabilization in Diamond with Multiple Valleys and Bands
Abstract
The existence of polyexcitons, the -body complexes of excitons for in 3D bulk systems, has been controversial for more than 40 years since its first theoretical suggestion. We investigated the stability of fundamental excitonic complexes in diamond numerically with the stochastic variational method (SVM) and an explicitly correlated Gaussian (ECG) basis. The electron-hole many-body system is described by an effective mass Hamiltonian. Our model includes the effective mass anisotropy and multiple valley and band degrees of freedom. We show that the excitons, trions, biexcitons, charged biexcitons, and triexcitons are stable in diamond. Numerical calculations reproduce from 81% to 86% of the experimentally reported binding energies for neutral bound states.
Keywords
Cite
@article{arxiv.1609.02298,
title = {Numerical Investigation of Triexciton Stabilization in Diamond with Multiple Valleys and Bands},
author = {Hiroki Katow and Junko Usukura and Ryosuke Akashi and Kálman Várga and Shinji Tsuneyuki},
journal= {arXiv preprint arXiv:1609.02298},
year = {2017}
}