• MUSTAFA GUNES

Articles written in Bulletin of Materials Science

• Structural and optical properties of diluted magnetic Ga$_{1−x}$Mn$_x$As–AlAs quantum wells grown on high-index GaAs planes

We report on the structural and optical properties of Ga$_{1−x}$Mn$_x$As–AlAs quantum wells (QWs) with $x = 0.1$% grown by molecular beam epitaxy (MBE) on semi-insulating GaAs substrates with orientations (100), (110), (311)B and(411)B. Atomic force microscopy (AFM), X-ray diffraction (XRD) and photoluminescence (PL) techniques were used toinvestigate these QWs. AFM results have evidenced the formation of Mn-induced islands, which are randomly distributedon the surface. These islands tend to segregate for samples grown on (110) and (411)B planes, while no clear segregationwas observed for samples grown on (100) and (311)B orientations. Results show that the PL line width increases with Mnsegregation. XRD measurements were used to determine 2$\theta$, $d$ and cell parameters.

• # Bulletin of Materials Science

Current Issue
Volume 42 | Issue 6
December 2019

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Posted on July 25, 2019