Fermi surface and electronic structure of Pb/Ge„111..
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چکیده
The electronic structure of Pb/Ge~111! has been probed along the temperature-induced phase transition a 2A33A3R30°⇒333 using angle-resolved photoemission. The a2A33A3R30° phase is metallic due to the existence of a half-filled, dispersing surface band. The 333 phase is characterized by the appearance of an additional surface band with 333 periodicity, whose role in the phase transition is discussed. The Fermisurface topology of the a2A33A3R30° phase has been probed using angle-resolved photoemission. Its shape is undulated, and it resembles strongly the theoretical prediction, with a Fermi momentum of 0.31 Å along
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تاریخ انتشار 1998