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 twoand quasi-one-dimensional metallic ones, the conductivity, its anisotropy, and the Hall effect in the surface stat...

The radial velocities of 1800 nearby Sun-like stars are currently being monitored by eight high-sensitivity Doppler exoplanet surveys. Approximately 90 of these stars have been found to host exoplanets massive enough to be detectable. Thus, at least 5% of target stars possess planets. If we limit our analysis to target stars that have been monitored the longest ( 15 years), 11% possess planets....

Through a combination of experimental techniques we show that the topmost layer of the topological insulator TlBiSe2 as prepared by cleavage is formed by irregularly shapedTl islands at cryogenic temperatures and bymobile Tl atoms at room temperature. No trivial surface states are observed in photoemission at low temperatures, which suggests that these islands cannot be regarded as a clear surf...

The solar surface dynamo has become an active area of research in an attempt to understand the origin of a variety of magnetic field structures on the sun. The major modification that needs to be incorporated in the standard dynamo process is the inclusion of the partial ionization of the gas in the layers underlying and overlaying the photosphere along with the effects associated with the mult...

   In this study, the change of porosity and roughness of carbon nanostructures, including fullerenes, carbon nanotubes and graphene was investigated according to oxidation process. The effect of oxidation was more sensible on smoother surface of nanostructures. Oxidation increases surface roughness of graphene up to 5.2% and porosity up to 35.2%. While, roughness of hummers graphene is 13....