Cyclotron resonance measurements of the high-quality single crystal GdSb

Abstract Cyclotron resonance (CR) measurements on single crystals of GdSb have been performed in the frequency range from 50 to 110 GHz . By using the high-quality crystal with the residual resistivity ratio of about 500, two CR absorption lines are observed at low temperatures for B||[0 0 1] . The effective mass values are estimated to be 0.26 m 0 and 0.50 m 0 , respectively.