Reply to Comment on 'Two-dimensional charged-exciton complexes'

[摘要] We respond to criticisms raised by K. Varga [Phys. Rev. B 57, 13 305 (1998)] and reaffirm that the results in our original paper obtained using a two-body analytical method remains valid within the framework of an effective excitonic composite model. The conceptual model of the excitonic systems as well as the numerical method based on variational functions utilized by Varga differ significantly from ours. Hence comparison of binding energies of the charged biexciton remains questionable. In this reply, we discuss the shortcomings of modeling the charged biexciton as a five-body system and treating excitonic complexes as atomic systems, as done in Varga's Comment. We also clarify the somewhat misleading statement that the charged-biexciton complex is stable for any value of the mass ratio in our original paper and derive a simple criterion for the existence of a single bound charged-biexciton state.