Theory of electron-hole exchange interaction in double quantum dots

Hanz Y. Ramirez, Shun-Jen Cheng*, Chih Pin Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A theory of electron-hole exchange interaction in vertically stacked double quantum dots is developed. This theory was built up from the full interacting Hamiltonian of two coupled dots, taking into account both of the macroscopic and microscopic natures of particle wave functions. In the basis of S-type Fock-Darwin orbitals, compact formulations for electron-hole exchange terms responsible for the fine structure splitting of spin exciton states as functions of material parameters, geometric structure of dots, and the strength of external field are explicitly derived. Significant reduction of the splitting, down to 50% of the magnitude of such energy in single dot cases, is observed as the system is switched into the near-resonance regime.

Original languageEnglish
Pages (from-to)837-841
Number of pages5
JournalPhysica Status Solidi (B) Basic Research
Volume246
Issue number4
DOIs
StatePublished - 1 Apr 2009

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