Fermiology and transport in metallic monatomic layers on semiconductor surfaces

We review Fermi surfaces and band dispersion of metallic monatomic layers (surface superstructures) on semiconductor substrates studied by photoemission spectroscopy, in connection with the surface electronic transport properties. By using various surface superstructures such as two- and quasi-one-dimensional metallic ones, the conductivity, its anisotropy, and the Hall effect in the surface states are understood quantitatively by the Fermi surfaces and band dispersion using the Boltzmann picture. The experimental techniques and analysis procedures are described, which are applicable to various surface systems. This demonstrates that surface atomic layers provide an intriguing platform for the study of atomic-scale low dimensional electron dynamics.