New evidence for a clean thermally induced c(2×2) surface structure on W(100)

LEED intensities, work function changes and fine structure in the Auger electron spectrum are reported for W(100) which show conclusively that the clean surface reconstructs on cooling below 400K to a c(2*2) structure. The work function of the c(2*2) surface is within 15 mV of the (1*1) surface. However, changes in the N7VV AES transition during the transformation (1*1) to c(2*2) show some attenuation of the surface-sensitive feature which has been attributed to a W(100) surface state.