Band structure, g-factor, and spin relaxation in n-type InAsP alloys

We present experimental and theoretical studies of the magneto-optical properties of n-type InAsxP1-x films in ultrahigh magnetic fields at room temperature. We compare Landau level and band structure calculations with observed cyclotron resonance (CR) measurements and extract effective g-factors and CR masses for two different alloy concentrations, x = 0.07 and x = 0.34. In addition, we employ time-resolved magneto-optical Kerr measurements on these ternary alloys to explore the spin relaxation time. These alloys have immense prospects for quantum communication devices and g-factor engineering, and our study provides insights into this underexplored narrow-gap system.