Order-to-disorder phase-transition study of Pb on Ge(111).
نویسندگان
چکیده
منابع مشابه
On phase transitions in Pb/Ge(111) and Sn/Ge(111)
The present communication is a critical examination of two points relevant to the surface phase transitions in Pb and Sn overlayers on Ge(111). One is connected with the interpretation of the reported structural data, which lead to some consequences of paramount importance but overlooked up to now. The other point is the seeming contradiction in what concerns to the transition temperatures obta...
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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 discu...
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The phonon dynamics of the Sn/Ge(111) interface is studied using high-resolution helium atom scattering and first-principles calculations. At room temperature we observe a phonon softening at the Kmacr; point in the (sqrt[3]xsqrt[3])R30 degrees phase, associated with the stabilization of a (3x3) phase at low temperature. That phonon band is split into three branches in the (3x3) phase. We analy...
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ورودعنوان ژورنال:
- Physical review. B, Condensed matter
دوره 51 4 شماره
صفحات -
تاریخ انتشار 1995