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Iodine adsorption on the Ag(110) surface: Uniaxial compression and iodide growth
Surface Science. 2025. Vol. 760. Article 122769.
B.V. Andryushechkin, Denisenkov V. S., Komarov N. S., Pavlova T. V.
Adsorption of iodine on Ag(110) has been studied in ultra high vacuum with room temperature scanning tunneling microscopy (STM) and low energy electron diffraction (LEED) in combination with density functional theory (DFT) calculations. It was found that at low coverages iodine forms structure. Further adsorption of iodine leads to compression of atoms in the troughs along direction and formation of domain walls separating domains. As the coverage increases compression in the troughs causes domain walls to disappear and iodine atoms to form a distorted hexagonal structure. This structure is compressed with more iodine on the surface. With further exposure to iodine AgI islands are formed on the monolayer of iodine. The formation of islands begins at the edges of atomic steps and it was found that the top layers of islands also have distorted hexagonal structure. In this structure one of the directions of atomic rows coincide with the direction of the substrate. The other two directions of atomic rows are turned relatively to substrate causing a moire pattern on the surface of islands. The AgI growth occurs in the form of double layer honeycomb (DLHC) sandwich-like structure.
Budkov Y., Kiselev M. G., Journal of Chemical Physics 2026 Vol. 165 No. 12 Article 124508
We develop a three-mode statistical-mechanical theory for a two-conformer
solute in a near-critical solvent. A compressible lattice model with
vacancies yields the Gaussian free-energy functional for a critical conserved
density, an orthogonal noncritical conserved mode, and the local conformer
fraction. Their couplings follow from packing and cohesive interactions,
rather than being introduced phenomenologically. Kawasaki transport of the
two conserved fields and ...
Added: September 24, 2026
Yurova P., Stenina I., Yaroslavtsev A. B., Membranes and Membrane Technologies 2026 Vol. 8 No. 1 P. 1–8
In this work, the effect of applying layers of polyethyleneimines with different molecular weights
(1300 and 25000 Da), polystyrene sulfonic acid or sodium polyacrylate on the surface of the heterogeneous
membrane MK-40 on the selectivity to singly charged ions was investigated. It is shown that the modification
leads to an increase in the selectivity coefficients P(Na+/Ca2+) and P(Li+/Mg2+), ...
Added: September 24, 2026
Kryzhanovskaya N., Makhov I., Dragunova A., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2026 Vol. 19 No. 1.1 P. 98–104
The planar microcavity structure was grown using molecular-beam epitaxy.
Single-mode lasing was observed at a wavelength of 960 nm for pillars with a diameter of
15 μm. At 300 K, the lasing threshold was approximately 30 mW. Increasing the pump
power to 2.7 times the threshold power resulted in a mode energy shift of approximately
1 meV. This shift ...
Added: September 23, 2026
Andreeva S., Gavrilov A. A., Dzhikirba K. R. et al., Physical Review B: Condensed Matter and Materials Physics 2026 Vol. 114 Article 134515
We examine plasma excitations with linear dispersion in a system of superconducting electrons in thin
NbN disks. Using frequency-domain terahertz spectroscopy, we study the evolution of plasmons up to critical
temperature Tc. The observed excitations tend to shift to the lower frequencies while temperature is increasing
and the spectral features vanish at T > Tc. We study the ...
Added: September 23, 2026
Образцова А. А., Ivanov K., Moiseev E. et al., Journal of Physics D: Applied Physics 2026 Vol. 59 No. 30 P. 305103
We demonstrate a thermo-optically tunable microlaser based on an InGaAs/GaAs quantum-dot (QD) active region employing a deformed limaçon-shaped cavity. The asymmetric geometry effectively lifts the degeneracy of high-Q whispering-gallery modes, enabling single-mode lasing. A side-mode suppression ratio exceeds 25 dB over a wide current range. Under continuous-wave electrical pumping, the device achieves a peak output power ...
Added: September 23, 2026
Budkov Y., Journal of Chemical Physics 2026 Vol. 165 No. 12 Article 124105
Exact theories of electrolyte structure must satisfy the nonlocal constraints imposed by electrostatic screening, yet these constraints are most commonly formulated only for homogeneous bulk systems and at the level of two-point correlations. Here, we develop a unified field-theoretic framework that extends them to general inhomogeneous ionic fluids and nonlinear charge correlations. Using a standard ...
Added: September 22, 2026
Боровицкая И. В., Пименов В. Н., Коршунов С. Н. et al., Перспективные материалы 2026 № 10 С. 37–54
Проведено сравнение, обобщение и систематизация механизмов эрозии и разрушения
поверхности малоактивируемых материалов, перспективных для использования в
качестве материалов вакуумной камеры термоядерных реакторов: ванадия, его сплава
V – 10 Ti – 6 Cr – 0,05 Zr – 0,1 Si и вольфрама при последовательном воздействии на
них ионных и тепловых потоков. Тепловые потоки имитировали с помощью мощного
импульсного лазерного излучения (ЛИ), создаваемого ...
Added: September 22, 2026
Iontsev M.A., Mukhin S. I., Fistul M. V., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 94 No. 17 P. 174–510
We report a theoretical study of the ac response of superconducting quantum metamaterials (SQMs), i.e., an array of qubits (two-level systems) embedded in a low-dissipative resonator. By making use of a particular example of a SQM, namely the array of charge qubits capacitively coupled to the resonator, we obtain a second-order phase transition between an ...
Added: September 22, 2026
Shilov A. L., Elesin L., Kravtsov M. et al., Nature Communications 2026 Vol. 17 No. 1 Article 9734
Identifying the microscopic processes limiting conductivity is essential for understanding correlated quantum materials. In twisted bilayer graphene, metallic resistivity follows ρ ~ Tα with widely varying α, fueling competing interpretations from phonon-limited transport and umklapp scattering to strange metallicity and heavy-fermion renormalization. Here, we use terahertz excitation to selectively heat electrons while keeping the lattice cold, separating ...
Added: September 20, 2026
sobov P., Yakushev I., Shestakov A. et al., Organometallics 2025 Vol. 44 No. 24 P. 2873–2881
Interaction of {Cryptand(K+)}(C60•–) with CpCo(CO)2 yields the air-sensitive crystalline salt {Cryptand(K+)}{CpCo(CO)-η2-C60•–} (1), in which C60•– replaces carbonyl group in CpCo(CO)2. Two Co–C bonds of 2.028(9) and 2.057(8)Å are formed. The magnetic moment of 1 is 1.72 μB, indicating a doublet S = 1/2 spin state of {CpCo(CO)-η2-C60•–} at 300 K. The compound shows a broad ...
Added: September 20, 2026
Ibrahim A., Derkach D., Kaledin M. et al., Computer Physics Communications 2026 Vol. 329 Article 110407
We present RLABC (Reinforcement Learning for Accelerator Beamline Control), an open-source Python framework that automatically transforms standard Elegant beamline configurations into reinforcement learning environments. RLABC integrates with the widely-used Elegant beam dynamics simulation code via SDDS-based interfaces, enabling researchers to apply modern RL algorithms to beamline optimization with minimal RL-specific development. Validation on a test ...
Added: September 20, 2026
Копьев А., JETP Letters 2026 Vol. 123 No. 5 P. 310–316
The incompressible three-dimensional Euler equations develop very thin pancake-like regions of exponen tially increasing vorticity. The characteristic thickness of such regions decreases exponentially with time, while the other two dimensions do not change considerably, making the flow near each pancake strongly anisotropic. The pancakes emerge in increasing number with time, which may enhance the anisotropy ...
Added: September 18, 2026
Захаров А. В., Düven H., Capar M. I., Physics Letters A 2026 No. 576 Article 131388
Molecular dynamics simulations were carried out to study the structural properties of nematic pentyl
cyanobiphenyl (5CB) and pentyloxy cyanobiphenyl (5OCB) liquid crystals (LCs) doped with gold nanoparti
cles (GNPs) of different numbers, shapes and sizes. The spherical GNPs of two different radii and rod-like have
been doped in 5CB and 5OCB cyanobiphenyl liquid crystals. In order to describe ...
Added: September 17, 2026
B.V. Andryushechkin, Павлова Т. В., В.М. Ш. et al., Physical Chemistry Chemical Physics 2026 Vol. 28 No. 1 P. 47–51
The early stage of molecular oxygen adsorption on the Ag(100) surface was reexamined with scanning tunneling microscopy (STM) and density functional theory. Using an oxygen-functionalized STM tip, we demonstrated that the simple interpretation of the individual objects randomly distributed over the surface as chemisorbed oxygen atoms is incompatible with the cross-shaped structures observed in atomic-resolution ...
Added: February 17, 2026
B. V. Andryushechkin, Pavlova T. V., Shevlyuga V. M. et al., Physics of Wave Phenomena 2025 Vol. 33 No. 6 P. 424–433
Adsorption of molecular oxygen on the Ag(111) surface at room temperature has been studied using scanning tunneling microscopy (STM), Auger-electron spectroscopy (AES), temperature programmed desorption (TPD), and density functional theory (DFT). In the early stage of adsorption, the STM images show formation of a disordered phase in the form of dark spots (local oxide (Ag6O6) ...
Added: February 17, 2026
Tararushkin E., Ruban A., Bu H. et al., Journal of Molecular Liquids 2026 Vol. 448 Article 129359
This study investigates the molecular mechanisms governing ammonium interactions with glauconite, a potassium- and iron-rich phyllosilicate, focusing on the structure and dynamics of aqueous NH4NO3 solutions confined at mineral interfaces. Glauconite-ammonium nanocomposites (GANs) were prepared with varying ammonium concentrations and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, Brunauer-Emmett-Teller method, ...
Added: February 9, 2026
I. N. Senchikhin, Konarev P. V., Volkov V. V. et al., Journal of Chemical Physics 2025 Vol. 162 No. 9 Article 094307
The behavior of silver nitrate in non-aqueous liquid oligomeric media—aromatic and aliphatic diglycidyl ethers and aliphatic diamine—hasbeen investigated. By employing UV–visible spectrophotometry and dynamic light scattering, it has been shown that in diglycidyl oligomers,regardless of the nature of the monomeric unit, the formation of silver nanoparticles occurs, and the kinetics of this process has been ...
Added: March 10, 2025
Aladyshkin A. Y., Chaika A. N., Semenov V. N. et al., Ultramicroscopy 2024 Vol. 267 Article 114053
The main feature of vicinal surfaces of crystals characterized by the Miller indices(ℎℎ𝑚)is rather small width(less than 10 nm) and substantially large length (more than 200 nm) of atomically-flat terraces. This makesdifficult to apply standard methods of image processing and correct visualization of crystalline lattices at theterraces and multiatomic steps. Here we consider two procedures ...
Added: June 5, 2024
B. V. Andryushechkin, Loginov B. A., Physics of Wave Phenomena 2023 Vol. 31 No. 2 P. 67–73
Structural transformations under chlorine adsorption on the Ag(100) surface have been studied with scanning tunneling microscopy (STM) and within the density functional theory (DFT) calculations. The DFT method reveals that the preferable adsorption site of chlorine atoms is the fourfold hollow position. The STM technique is used to study the disorder-order structural phase transition occurring ...
Added: March 24, 2024
B. V. Andryushechkin, Pavlova T. V., Shevlyugaa V. M., Physical Chemistry Chemical Physics 2024 Vol. 26 No. 2 P. 1322–1327
The atomic structure of the Ag(111)-p(4 × 4)-O phase was reexamined with scanning tunneling microscopy (STM) and density functional theory. We discovered two different phases with the same (4 × 4) periodicity and demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images. Using bias dependencies of the STM images, we have shown ...
Added: March 24, 2024
Berman S., Zhussupbekova A., Walls B. et al., Physical Review B: Condensed Matter and Materials Physics 2023 Vol. 107 No. 16 Article 165425
The niobium surface is almost always covered by a native oxide layer which greatly influences the performance
of superconducting devices. Here we investigate the highly stable niobium oxide overlayer of Nb(110), which is
characterized by its distinctive nanocrystal structure as observed by scanning tunneling microscopy (STM). Our
ab initio density functional theory (DFT) calculations show that a subtle ...
Added: December 24, 2023
Chekmazov S. V., Zagitova A. A., Ionov A. M. et al., Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques 2023 Vol. 17 No. 3 P. 620–624
The electronic and atomic structure and transport properties of black phosphorus single crystals prepared by high-pressure and gas-transport methods were studied by X-ray photoelectron spectroscopy and scanning probe microscopy (STM, AFM). The atomic resolution of the single crystal surface was obtained by scanning tunneling microscopy. After exposure of the clean surface under ambient conditions, the ...
Added: December 19, 2023
B. V. Andryushechkin, Pavlova T. V., Journal of Chemical Physics 2022 Vol. 156 No. 16 Article 164702
Room temperature adsorption of molecular iodine on Ag(111) has been studied by scanning tunneling microscopy (STM), low energy electron diffraction, Auger electron spectroscopy with factor analysis, and density functional theory (DFT). At the chemisorption stage, iodine first forms a (√3 ×√3)R30○ structure. Further iodine dosing leads to continuous commensurate–incommensurate phase transition, taking place via the formation of striped ...
Added: December 13, 2022
Valentina Zhurikhina, Skvortsov A., Babich E. et al., , in: IEEE International Conference on Electrical Engineering and Photonics (EExPolytech).: St. Petersburg: IEEE, 2021. Ch. 40 P. 168–170.
Added: September 23, 2022