Summary Abstract: Surface Vibrational Resonances and the Order-Disorder Transformation of the W(100) Surface

摘要

The vibrational properties of clean W(100) surfaces have been studied as a function of temperature using electron energy loss spectroscopy. an intrinsic phonon mode on the clean surface appears at low temperature and vanishes above room temperature. This surface phonon appears to be related to the order-disorder transformation (A c(2x2) structure exists at low temperature), and offers interesting prospects for studying the transformation.