Abstract
Recently, the present author introduced a simple qualitative theory of the instability and reconstruction of surfaces of solids exhibiting a certain covalent component of bonding. This theory is now applied to the (2×1) Si(001) and (111) surfaces, with a possible extension to analogous surfaces of germanium and GaAs(001). It is proposed that Shockley surface states from the vicinity of the Fermi energy play a key role in the electron-phonon coupling.
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