Two-dimensional electron-hole system in a HgTe-based quantum well

A two-dimensional electron-hole system consisting of light high-mobility electrons with a density of N-s = (4-7) x 10(10) cm(-2) and a mobility of mu(n) = (4-6) x 10(5) cm(2)/V s and heavier low-mobility holes with a density of P-s = (0.7-1.6) x 10(11) cm(-2) and a mobility of mu(p) = (3-7) x 10(4) cm(2)/V s has been discovered in a quantum well based on mercury telluride with the (013) surface orientation. The system exhibits a number of specific magnetotransport properties in both the classical magnetotransport (positive magnetoresistance and alternating Hall effect) and the quantum Hall effect regime. These properties are associated with the coexistence of two-dimensional electrons and holes.