Measurement of the effective electron mass in GaInNAs by energy-loss spectroscopy

Gass, M.H.; Papworth, A.J.; Joyce, T.B.; Bullough, T.J.; Chalker, P.R.
March 2004
Applied Physics Letters;3/1/2004, Vol. 84 Issue 9, p1453
Academic Journal
Imaging of the electronic structure of a GaInNAs/GaAs quantum well has been investigated by mapping the variation in the plasmon frequency using an electron energy-loss spectrometer on a dedicated field emission gun scanning transmission electron microscope. Kramers–Kronig analysis of the single scattered low-loss region yields a measure of the joint effective valence electron density. The average electron density has been used to provide a direct measurement of the electron effective mass of GaInNAs. The reduced mass was found to be 0.0874m[sub 0] for a 7 nm thick Ga[sub 0.9]In[sub 0.1]N[sub 0.04]As[sub 0.96] quantum well. © 2004 American Institute of Physics.


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