Cyclotron resonance studies of GaInP and AlGaInP

Abstract

The electron effective masses for Al0.15Ga0.35In0.5P and Ga0.5In0.5P have been investigated using conventional and optically detected cyclotron resonance. For AlGaInP (partly ordered) it is determined to be m*=(0.14±0.01) m0. For disordered GaInP the mass is found to be m*=(0.092±0.003) m0 and for ordered material (band gap reduction ∼50 meV) m*=(0.088±0.003) m0. The experimentally deduced values are compared with those obtained from five-band k⋅p calculation.

Far-infrared-magneto-optic ellipsometry characterization of free-charge-carrier properties in highly disordered n-type Al0.19Ga0.33In0.48P

“…In particular, the ⌫-point hole and electron effective masses, which are important band structure parameters, were not determined experimentally for unstrained, disordered (Al x Ga 1Ϫx ) 0.52 In 0.48 P. 2 There is only one experimental work available on this matter in the literature reporting the electron effective mass m* in partially CuPt-type ordered Al 0.15 Ga 0.35 In 0.5 P from optically detected cyclotron resonance. 3 A recent review article suggests to approximate m* of disordered (Al x Ga 1Ϫx ) 0.52 In 0.48 P by interpolation between m* of GaInP and AlInP, 2 where the value for m* of AlInP is still insecure.…”

Magnetoluminescence study on the effective mass anisotropy of CuPtB-ordered GaInP2 alloys

“…Emanuelsson et al presented optically detected cyclotron resonance measurements 9 and concluded that the CB effective mass in an ordered GaInP sample decreases to m c ϭ0.088Ϯ0.003 from m c ϭ0.092 Ϯ 0.003 in the disordered alloy ͑without giving the orientation of the magnetic field͒. All effective masses are given in units of the free-electron mass.…”

Magneto-photoluminescence study of type-II charge confinement in epitaxially grown GaInP2

“…Since we have measured the e ective mass of the free carrier, we can test the validity of this explanation. Cyclotron resonance measurements on CVD-grown GaInP 2 with strong and weak CuPt ordering have found the electron e ective mass to be 0:088m 0 and 0:092m 0 , respectively [9]. These values agree well with 8-band k · p calculations that ÿnd 0:092m 0 in unordered GaInP 2 and a decreasing electron e ective mass with increasing ordering [10].…”