INTRINSIC QUANTUM HALL-EFFECT IN INAS/GA1-XINXSB CROSSED GAP HETEROSTRUCTURES IN HIGH MAGNETIC-FIELDS

We report a study of the quantum Hall effect and Shubnikov-dc Haas oscillations in semimctallic type II heterostructures of the strained layer system InAs/Ga1−xInxSb which are almost intrinsic. In high magnetic fields up to 50 T, ρxy has large peaks, demonstrating the high degree of charge compensation in the system. Between these peaks, intrinsic quantum Hall minima arc observed, where ρxy approaches zero.