Vladivostok State University of Economics and Service

About: Vladivostok State University of Economics and Service is a education organization based out in Vladivostok, Russia. It is known for research contribution in the topics: Scanning tunneling microscope & Silicon. The organization has 342 authors who have published 472 publications receiving 2360 citations.

Formation of the ordered array of Al magic clusters on Si(111)7×7

Abstract: Deposition of Al onto the Si(111)7\ifmmode\times\else\texttimes\fi{}7 surface held at temperatures ranging from 475 to 600 \ifmmode^\circ\else\textdegree\fi{}C has been found to result in the formation of a superlattice of the identical-size nanoclusters (magic clusters). The Al magic clusters appear to have the structure similar to that reported recently for the magic clusters of Ga and In on Si(111): each cluster contains six metal atoms linked by three Si atoms. The present results reveal that at the early stages of deposition all the group III metals demonstrate a distinct tendency for the formation of the magic clusters on Si surfaces.

Two-Dimensional Superconductor with a Giant Rashba Effect: One-Atom-Layer Tl-Pb Compound on Si(111)

Abstract: A one-atom-layer compound made of one monolayer of Tl and one-third monolayer of Pb on a Si(111) surface having √3×√3 periodicity was found to exhibit a giant Rashba-type spin splitting of metallic surface-state bands together with two-dimensional superconducting transport properties. Temperature-dependent angle-resolved photoelectron spectroscopy revealed an enhanced electron-phonon coupling for one of the spin-split bands. In situ micro-four-point-probe conductivity measurements with and without magnetic field demonstrated that the (Tl, Pb)/Si(111) system transformed into the superconducting state at 2.25 K, followed by the Berezinskii-Kosterlitz-Thouless mechanism. The 2D Tl-Pb compound on Si(111) is believed to be the prototypical object for prospective studies of intriguing properties of the superconducting 2D system with lifted spin degeneracy, bearing in mind that its composition, atomic and electron band structures, and spin texture are already well established.

A strategy to create spin-split metallic bands on silicon using a dense alloy layer

Abstract: To exploit Rashba effect in a 2D electron gas on silicon surface for spin transport, it is necessary to have surface reconstruction with spin-split metallic surface-state bands. However, metals with strong spin-orbit coupling (e.g., Bi, Tl, Sb, Pt) induce reconstructions on silicon with almost exclusively spin-split insulating bands. We propose a strategy to create spin-split metallic bands using a dense 2D alloy layer containing a metal with strong spin-orbit coupling and another metal to modify the surface reconstruction. Here we report two examples, i.e., alloying reconstruction with Na and Tl/Si(111)1 × 1 reconstruction with Pb. The strategy provides a new paradigm for creating metallic surface state bands with various spin textures on silicon and therefore enhances the possibility to integrate fascinating and promising capabilities of spintronics with current semiconductor technology.