Abstract
Ion-shadowing and blocking measurements reveal a reversible order-disorder transition at the (110) surface of a lead crystal well below its melting point . The transition starts with partial disordering of the surface region at approximately 0.75. Closer to a completely disordered film builds up with a thickness that increases rapidly as the temperature approaches . Electron diffraction patterns show the loss of two-dimensional order of the Pb(110) surface, at a temperature where the surface is nearly completely disordered. A detailed analysis of the surface cleanliness provides evidence against the possible role of surface impurities in the observed effects.
- Received 20 June 1986
DOI:https://doi.org/10.1103/PhysRevB.34.7506
©1986 American Physical Society