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Publication
Physical Review B
Paper
Direct measurement of the density of states of a two-dimensional electron gas
Abstract
We present a direct measurement of the density of states of a two-dimensional electron gas in a quantizing magnetic field. By measuring the magnetocapacitance of modulation-doped GaAs-(AlGa) As heterostructures at low frequencies, we have observed quantum oscillations resulting from changes in the density of states alone. © 1985 The American Physical Society.