Diamagnetic response of exciton complexes in semiconductor quantum dots.
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.
Tsai
Ming-Fu
MF
Department of Electronic Engineering, National Chiao Tung University, Hsinchu, 300 Taiwan.
Lin
Hsuan
H
Lin
Chia-Hsien
CH
Lin
Sheng-Di
SD
Wang
Sheng-Yun
SY
Lo
Ming-Cheng
MC
Cheng
Shun-Jen
SJ
Lee
Ming-Chih
MC
Chang
Wen-Hao
WH