Cyclotron resonance in P-doped InSb quantum wells

A combined experimental and theoretical study of cyclotron resonance was conducted on a two-dimensional hole system in an InSb quantum well, which was 9 nm thick and compressively strained by ∼0.65%. An effective mass of 0.065mo and a g-factor |g∗|≈23 were deduced from cyclotron resonance features at magnetic fields of 2.5 T and 6 T, respectively, when the InSb quantum well had a hole density of 3.5×1011 cm−2. At higher magnetic fields, separate cyclotron resonances are observed for different spin-conserving transitions. The magnetic field dependences of the effective mass and g-factor for holes are well explained by an 8-band Pidgeon-Brown model generalized to include the effects of the confinement potential and pseudomorphic strain.