Effective mass of two-dimensional electron gas in δ-doped Al0.48In0.52As/Ga0.47In0.53As quantum wells
Journal
Journal of Applied Physics
Journal Volume
22
Journal Issue
9
Pages
3355-3359
Date Issued
2007
Author(s)
Lo, I.
Abstract
We have studied the lowest two subbands of two-dimensional electron gas in δ-doped AlInAs/ GaInAs quantum wells by Shubnikov-de Haas, quantum Hall effect, and cyclotron resonance measurements The effective masses determined by the field-dependent cyclotron resonance measurements are 0.0576m0 and 0.0483m0 at electron densities of 17.3 and 3.6×1011 cm-2 for the first and second subbands, respectively. It was found that the electron in the first subband has heavier effective mass and shorter quantum lifetime than that in the second subband. Using the band gap of 810 meV and the band-edge mass of 0.042m0 for Ga0.47In0.53As, we calculated the average distance of the two subbands from the conduction band edge to be 150 and 61 meV, respectively. © 1996 American Institute of Physics.
SDGs
Type
journal article