Yd. Chen et al., Study of the inter-band transition of the GaAs single-crystal film on SrTiO3 substrate by MBE, ACT PHY C E, 48(9), 1999, pp. 1718-1722
This paper reports the molecular beam epitaxy growth of the GaAs single cry
stal film on the perovskite oxide SrTiO3 (001) substrate. The photo modulat
ed reflectance spectroscopy and the photoluminescence measurement show that
the energy band gap and optical property of the GaAs single crystal film o
n the SrTiO3 substrate is similar to that of the GaAs bulk material and the
broadening of band-to-band emission of the GaAs epitaxial film is 5 times
that of the GaAs single crystal.