Quantum Cyclotron Resonance in GaSb and Ge in High Magnetic Fields up to 330 kG

Quantum effects have been observed in the cyclotron resonance of holes in GaSb and Ge by using a far-infrared H 2 O laser (λ=119 µm) in pulsed high magnetic fields up to 330kG. An analysis of the experimental results in GaSb was made on the basis of the method of Pidgeon and Brown, and on referring to the assignment of the peaks in Ge made by Hensel and Suzuki. The experimentally determined Luttinger parameters of GaSb are: γ 1 =12.4, γ 2 =3.9, γ 3 =5.4, κ=3.2. In Ge, the magnetic field dependent mass shift was observed at 119 µm.