Hole-density dependence of the cyclotron mass of 2D holes in a GaAs(001) quantum well

The dependence of the heavy-hole cyclotron mass in GaAs(001) quantum wells on the 2D-hole density has been measured by the optical detection method for resonance microwave by-absorption. A significant increase (almost doubling) has been observed in the cyclotron mass of heavy holes with an increase in the charge carrier density from 1.2 x 10(10) cm(-2) to 1.3 x 10(11) cm(-2).