A5083997750- Surface and Thin Film Phenomena
- Semiconductor materials and interfaces
- Graphene research and applications
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Advanced Materials Characterization Techniques
- Advanced Chemical Physics Studies
- Topological Materials and Phenomena
- Semiconductor materials and devices
- Magnetic properties of thin films
- Fullerene Chemistry and Applications
- Semiconductor Quantum Structures and Devices
- Molecular Junctions and Nanostructures
- Superconductivity in MgB2 and Alloys
- Electronic and Structural Properties of Oxides
- Chemical and Physical Properties of Materials
- Advanced Semiconductor Detectors and Materials
- Nanowire Synthesis and Applications
- Optical Coatings and Gratings
- Advanced Condensed Matter Physics
- Iron-based superconductors research
- Boron and Carbon Nanomaterials Research
- Electron and X-Ray Spectroscopy Techniques
- nanoparticles nucleation surface interactions
- Quantum, superfluid, helium dynamics
Institute of Automation and Control Processes
2016-2025
Far Eastern Branch of the Russian Academy of Sciences
2015-2024
Far Eastern Federal University
2011-2017
IAC (United States)
2016
Russian Academy of Sciences
2005-2013
Vladivostok State University
2010
University of Toyama
2000-2004
A one-atom-layer compound made of one monolayer Tl and one-third Pb on a Si(111) surface having √3×√3 periodicity was found to exhibit giant Rashba-type spin splitting metallic surface-state bands together with two-dimensional superconducting transport properties. Temperature-dependent angle-resolved photoelectron spectroscopy revealed an enhanced electron-phonon coupling for the spin-split bands. In situ micro-four-point-probe conductivity measurements without magnetic field demonstrated...
To exploit Rashba effect in a 2D electron gas on silicon surface for spin transport, it is necessary to have reconstruction with spin-split metallic surface-state bands. However, metals strong spin-orbit coupling (e.g., Bi, Tl, Sb, Pt) induce reconstructions almost exclusively insulating We propose strategy create bands using dense alloy layer containing metal and another modify the reconstruction. Here we report two examples, i.e., alloying Na Tl/Si(111)1 × 1 Pb. The provides new paradigm...
Finding appropriate systems with a large spin splitting of metallic surface-state band which can be fabricated on silicon using routine technique is an essential step in combining Rashba-effect based spintronics technology. We have found that originally poor structural and electronic properties the Au/Si(111) √3 x surface substantially improved by adsorbing small amounts suitable species (e.g., Tl, In, Na, Cs). The resultant surfaces exhibit highly-ordered atomic structure spin-split...
Synthesis of the low-dimensional magnetic materials and control their properties are demanding tasks for nanotechnology material research. We report on resistance magnetoresistance measurements single-atomic-layer...
We report on the first observation of superconductivity in a double atomic layer Tl Si(1 1 1) using situ electrical resistivity measurements ultrahigh vacuum. The structure bilayer was characterized by set techniques, including scanning tunneling microscopy, electron diffraction and photoemission spectroscopy, which confirmed metastability metallic nature bilayer. epitaxial growth atomically thin 'soft' film over entire surface substrate enabled us to find macroscopic superconducting...
A two-dimensional compound made of one monolayer Tl and Sn on Si(111) has been found to have a sandwichlike structure in which the layer (having milk-stool arrangement) resides bulklike terminated surface honeycomb-chained-trimer is located above layer. The electronic band contains two spin-split surface-state bands, nonmetallic other metallic. Near Fermi level metallic split with momentum splitting $\ensuremath{\Delta}{k}_{\ensuremath{\parallel}}=0.037$ \AA{}${}^{\ensuremath{-}1}$ energy...
Structural transformations on the $\mathrm{Si}(111)\text{\ensuremath{-}}\ensuremath{\alpha}\text{\ensuremath{-}}\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3}\text{\ensuremath{-}}\mathrm{Au}$ surface induced by In adsorption have been studied using scanning tunneling microscopy and first-principles total-energy calculations. It has found that results in transformation of $\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3}\text{\ensuremath{-}}\mathrm{Au}$ phase to...
Abstract The post-graphene materials termed also as 2D-Xenes (X = Si, Ge, Sn, Pb, As, Sb or Bi) are atomic-layer sheets comprised of single-element atoms arranged in a honeycomb lattice on suitable substrate. In the present report, we introduce new member to current 2D-Xene family, thallene built Group-III element, thallium (Tl). It is formed when 2/3 monolayer mobile Tl single-layer NiSi 2 atop Si(111) substrate crystallizes upon cooling below ∼ 150 K into <mml:math...
Adsorption of ${\mathrm{C}}_{60}$ onto the Si(111)-$\ensuremath{\alpha}$-$\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3}$-Au surface with a high density domain walls and its In-induced modification, domain-wall-free Si(111)$\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3}$-(Au,In) surface, has been studied using scanning tunneling microscopy (STM). Adsorbed have found to form close-packed hexagonal arrays displaying specific patterns having different dim-bright STM contrast. On pattern...
Two-dimensional (2D) topological insulator is a promising quantum phase for achieving dissipationless transport due to the robustness of gapless edge states resided in insulating gap providing realization spin Hall effect. Searching two-dimensional realistic materials that are able provide effect and possessing feasibility their experimental preparation growing field. Here we report on (In, Sb)23×23 compound synthesized Si(111) substrate its comprehensive theoretical investigations based an...
Abstract Crystalline atomic layers on solid surfaces are composed of a single building block, unit cell, that is copied and stacked together to form the entire two-dimensional crystal structure. However, it appears this not an unique possibility. We report here synthesis characterization one-atomic-layer-thick Tl x Bi 1− compounds which display quite different arrangement. It represents quasi-periodic tiling structures built by set elements as blocks. Though layer lacking strict periodicity,...
Using scanning tunneling microscopy, reversible phase transitions have been detected in the modulated pseudomorphic In monolayer on Si(111) surface. It has found that room-temperature quasihexagonal $\sqrt{7}\ifmmode\times\else\texttimes\fi{}\sqrt{3}$ structure is transformed into $\sqrt{7}\ifmmode\times\else\texttimes\fi{}\sqrt{7}$ during cooling temperature range from $265\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}225\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. Further...
The Si(111)2$\ifmmode\times\else\texttimes\fi{}$2-In reconstruction can be considered as a precursor phase for the formation of metallic $\sqrt{7}\ifmmode\times\else\texttimes\fi{}\sqrt{3}$ phases In overlayers on Si(111) surface. Using ab initio random structure searching method, comparison simulated and experimental scanning tunneling microscopy images, resemblance calculated band to angle-resolved photoelectron spectra, we examined various...
Two-dimensional (2D) compounds having one-atomic-layer thickness represent a novel class of low-dimensional materials with potentially advanced properties. In the present progress review, we overview recent results on 2D metallic adsorbates Si(111) and Ge(111) surfaces. The main attention is focused their contribution to very modern subjects surface science, namely Rashba effect superconductivity. possible prospects studying are briefly discussed.
Adsorption of ∼0.1 ML Na onto the Si(111) -Au surface held at 300 °C has been found to induce pronounced changes in its structural and electronic properties. Domain wall networks, characteristic pristine surface, are removed completely, leading formation a highly ordered homogeneous surface. The original atomic arrangement is preserved atoms occupy T4 adsorption sites centers Si trimers. Upon adsorption, metallic S1 surface-state band develops. It characterized by large spin splitting...
Quantum phenomena at the ultimate atomic-scale two-dimensional limit attract increasing interest due to emergence of exotic physics and potential applications in prospective electronic devices. In this work, we carried out a theoretical experimental study atomic, electronic, spin structures single-atomic-layer PbBi compounds grown on silicon surface. We found that adsorption half-monolayer Bi Pb onto Si(111) surface leads formation an atomic layer consisting rhombuslike motifs. The motifs...
Two-dimensional compounds made of one monolayer Tl and one-third Pb, Bi, Te, or Se (but not Sn Sb) on Si(111) have been found to a similar atomic arrangement which can be visualized as $\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3}$-periodic honeycomb network chained trimers with atoms the second adsorbate occupying centers units. Structural electronic properties examined in detail theoretically using density functional theory (DFT) calculations experimentally low-energy electron...