Diamagnetic response of exciton complexes in semiconductor quantum dots

Ming Fu Tsai*, Hsuan Lin, Chia Hsien Lin, Sheng-Di Lin, Sheng Yun Wang, Ming Cheng Lo, Shun-Jen Cheng, Ming Chih Lee, Wen-Hao Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


We report measurements of diamagnetic shifts for different exciton complexes confined in small InAs quantum dots. The measured diamagnetic responses are sensitive to the number of carriers in the exciton complexes, with systematic differences between neutral excitons, biexcitons, and trions. Theoretical calculations suggest that such systematic differences arise from very different extents of electron and hole wave functions confined in small quantum dots. The measured magnetic response of Coulomb energies is found to vary with the cube of the wave function extent, and can be a sensitive probe to the electron-hole wave function asymmetry.

Original languageEnglish
Article number267402
JournalPhysical Review Letters
Issue number26
StatePublished - 22 Dec 2008

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