Photoluminescence of the Cr accepotr in boat-grown and LPE GaAs

Abstract
Accurate photoluminescence measurements of both LPE and boat‐grown GaAs show that the Cr acceptor has a binding energy of 838.0+0.2 meV at T=4.2 K. The spectra have a no‐phonon line at that energy and a broad structure due to phonon emission, with the TA phonon replica dominating.