Abstract
We report on direct IR–cyclotron resonance (CR) spectra of p-type cubic GaN (c-GaN) using semidestructive single-turn coil megagauss field generation. Two strong temperature dependent CR transitions were detected using measurement techniques with optimized signal to noise ratio resolving transmission changes smaller then 2%. On the basis of group theoretical relations between the valence-band energy-parameters of the effective Rashba–Sheka–Pikus Hamiltonian for the wurtzite and the effective Kohn–Luttinger Hamiltonian for the zincblende structure the Landau level scheme was calculated for c-GaN and compared with the observed transitions.
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