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VOLUME 39 (1984) | ISSUE 2 | PAGE 61
Phonon-drag observation of topological transitions in a 2D Fermi system
A study has been made of the phonon drag of surface charges in silicon metal-insulator-semiconductor structures fabricated on planes making an angle of 9° to 10°40' with the (001) face. The dependence of the phonon drag on the surface charge density Ns is complicated and has some strikingly large structural features which correspond to topological changes in the Fermi surface of the 2D charges. The size of the minigap in the electron spectrum is determined.