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Вычисление асимптотики спектра гамильтониана графена на поверхности с помощью некоммутативных координат.
С. 26–26.
Нескоромный Д. Ю.
Language:
Russian
In book
М.: Московский государственный институт электроники и математики, 2012.
Elesin L., Shilov A., Jana S. et al., Advanced Functional Materials 2026 P. 1–10
Thermoelectric materials, long explored for energy harvesting and thermal sensing, convert heat directly into electrical signals. Extending their application to the terahertz (THz) frequency range opens opportunities for low-noise, bias-free THz detection, yet conventional thermoelectrics lack the sensitivity required for practical devices. Thermoelectric coefficients can be strongly enhanced near van Hove singularities (VHS), though these ...
Added: May 28, 2026
Ивашенцева И. В., Федотов П. В., Каурова Н. С. et al., Журнал технической физики 2024 Т. 94 № 8 С. 1391–1397
A technology for sensitizing a structure consisting of a graphene nanoribbon (GNR) on a Si/GNR silicon substrate in the near-IR range of the electromagnetic spectrum is presented. This technology is based on doping the GNR with He4. A more than 25-fold increase in the response at a wavelength of 1.35 μm in the Si/GNR/He4 structure, ...
Added: December 23, 2025
Kilin A. A., Ivanova T. B., Lobachevskii Journal of Mathematics 2025 No. 46 P. 1113–1138
In this paper, we address the problem of the rolling motion of a sphere with axisymmetric mass distribution on a horizontal plane. It is assumed that the sphere does not slip as it rolls in the direction of the projection of the symmetry axis onto the supporting plane. The system under consideration admits a redundant ...
Added: December 10, 2025
Mehrabi-Kalajahi S., Ostovari Moghaddam A., Akbarpour S. et al., ACS Applied Energy Materials 2025 Vol. 8 No. 12 P. 8524–8531
High-entropy materials provide an interesting route for developing highly active electrocatalysts owing to their tunability and numerous active sites; however, their performance can be further improved with interfacial engineering in nanocomposite catalysts. In this study, (CoFeMnCuNiCr)3O4 high-entropy oxide (HEO) nanoparticles were synthesized and grafted onto graphene (HEO–G), graphene oxide (HEO–GO), and reduced graphene oxide (HEO–rGO) supports. ...
Added: June 16, 2025
A. N. Lyubchak, K. V. Shein, G.N. Goltsman et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2024 Vol. 17 No. 3.2 P. 116–120
Terahertz (THz) integrated circuits is a promising platform to create low cost and efficient components for high-speed sixth-generation (6G) communication networks. One of the key components for this application is detectors and mixers integrated on THz silicon waveguide. Graphene, due to its unique and tunable properties such as zero band gap, high charge mobility and low electronic heat capacity, has ...
Added: November 5, 2024
Bondareva P., Shein K., Lyubchak A. N. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2024 Vol. 17 No. 3.2 P. 46–51
Graphene, due to its record low electron heat capacity and weak electron-phonon coupling at low temperatures, is considered as a promising material for creating terahertz hot electron bolometers. The main challenge to the development of such devices is the weak dependence of graphene resistance on temperature. Here we demonstrate measurement system based on Johnson noise ...
Added: November 5, 2024
Kravtsov M., Shilov A. L., Yang Y. et al., Nature Nanotechnology 2025 Vol. 20 No. 1 P. 51–56
Light incident upon materials can induce changes in their electrical conductivity, a phenomenon referred to as photoresistance. In semiconductors, the photoresistance is negative, as light-induced promotion of electrons across the bandgap enhances the number of charge carriers participating in transport. In superconductors and normal metals, the photoresistance is positive because of the destruction of the ...
Added: October 9, 2024
Evlashin S., Fedorov F. S., Chernodoubov D. A. et al., Journal of Electroanalytical Chemistry 2024 Vol. 956 Article 118091
Carbon materials are of outstanding interest for use in energy sources. One of the latest achievements in improving their specific characteristics is the doping of carbon materials with various heteroatoms. However, the mechanisms that lead to improved performance remain unexplored. In this study, we investigated the influence of structural defects and incorporated heteroatoms on the ...
Added: February 9, 2024
P. I. Bondareva, K. V. Shein, A. N. Lyubchak et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2023 Vol. 16 No. 3.1 P. 128–132
In this paper we investigate a novel approach to inventing graphene-based sub-ter- ahertz bolometers using noise thermometry. Graphene is a unique material for detecting radi- ation in the sub-terahertz (0.1–1 THz) and terahertz (1–10 THz) ranges due to its record low electron heat capacity and weak electron-phonon coupling. This results in sufficient heating of graphene ...
Added: February 5, 2024
Арбузов А. А., Можжухин С. А., Лотоцкий М. В. et al., Журнал прикладной химии 2023 Т. 96 № 2 С. 217–224
В работе приведены результаты исследования взаимодействия композитов MgH2 с графеноподобным
или никель-графеновым материалом, полученных механохимической обработкой в атмосфере водорода, с водой и растворами лимонной кислоты различной концентрации. Установлено, что взаимодействие водного раствора лимонной кислоты с композитами характеризуется высокой скоростью:
98%-ный выход водорода достигается при мольном соотношении MgH2:лимонная кислота = 1:1.
Разработано устройство для получения компримированного водорода из композитов, ...
Added: September 29, 2023
Minkin A., Lebedeva I., Popov A. et al., Physical Review B: Condensed Matter and Materials Physics 2023 Vol. 108 No. 8 Article 085411
The potential energy surface (PES) of the interlayer interaction of infinite twisted bilayer graphene is calculated for a set of commensurate moiré patterns using the registry-dependent Kolmogorov-Crespi empirical potential. The calculated PESs have the same shape for all considered moiré patterns, and the unit cell size of the PESs is inversely related to the unit ...
Added: August 22, 2023
Grebenko A. K., Krasnikov D. V., Bubis A. et al., Advanced Science 2022 Vol. 9 No. 12 Article 2200217
Following the game-changing high-pressure CO (HiPco) process that
established the first facile route toward large-scale production of single-walled
carbon nanotubes, CO synthesis of cm-sized graphene crystals of ultra-high
purity grown during tens of minutes is proposed. The Boudouard reaction
serves for the first time to produce individual monolayer structures on the
surface of a metal catalyst, thereby providing a chemical ...
Added: December 11, 2022
Goltsman G., Gayduchenko I., Kovalyuk V., IEEE, 2022.
Here, we report on our recent efforts to develop of a photodetector based on single-layer graphene two-terminal device on the sapphire substrate. Our detector operates at , which corresponds to the telecom window. We have demonstrated that our detector operates under zero bias conditions at room temperature, and the signal-to-noise ratio reaches 45dB. The measured frequency ...
Added: August 1, 2022
Gazaliev A. S., Moskotin M. V., V V Belosevich et al., Journal of Physics: Conference Series 2021 Vol. 2086 No. 1 Article 012054
The growing requirements for mobile communication networks (data transfer rates over 100 Gbps) makes it necessary to use carrier signal with a frequency of at least 100 GHz. This requires the development of cheap and broadband sub-terahertz (sub-THz) detectors. Here we report on our recent efforts toward the development of a heterodyne sub-THz detector based ...
Added: August 1, 2022
Y E Matyushkin, I A Gayduchenko, M V M. et al., Journal of Physics: Conference Series 2018 Vol. 1124 No. 5 Article 051054
We report on detection of sub-THz radiation (129-430 GHz) using graphene based asymmetric field-effect transistor (FET) structures with different channel geometry: monolayer graphene, graphene nanoribbons. In all devices types we observed the similar trends of response on sub-THz radiation. The response fell with increasing frequency at room temperature, but increased with increasing frequency at 77 ...
Added: May 20, 2022
Shabanov A., Moskotin M., Belosevich V. et al., Applied Physics Letters 2021 Vol. 119 No. 16 Article 163505
Detectors of terahertz radiation based on field-effect transistors (FETs) are among the most promising candidates for low-noise passive signal rectification both in imaging systems and wireless communications. However, it was not realized so far that geometric asymmetry of common FETs with respect to source-drain interchange is a strong objective to photovoltage harvesting. Here, we break ...
Added: May 20, 2022
Berman O., Yurii E. Lozovik, Kezerashvili R. et al., Scientific Reports 2022 Vol. 12 Article 2950
We study direct and indirect pseudomagnetoexcitons, formed by an electron and a hole in the layers of gapped graphene under strain-induced gauge pseudomagnetic field. Since the strain-induced pseudomagnetic field acts on electrons and holes the same way, it occurs that the properties of single pseudomagnetoexcitons, their collective effects and phase diagram are cardinally different from ...
Added: May 9, 2022
Sinner A., Lozovik Y., Ziegler K., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 104 No. 24 Article 245124
We study the interlayer pairing states in layered systems of two different 2d electronic subsystems, one with relativistic linear and the other with nonrelativistic parabolic spectrum. The complex order parameter of the paired state has a two-component structure. We investigate the pairing state formation on the mean-field level, determine the critical interaction strength and evaluate ...
Added: January 2, 2022
Tarasov B., Arbuzov A., Volodin A. et al., Journal of Alloys and Compounds 2022 Vol. 896 Article 162881
The paper presents a review of the authors’ studies of advanced functional composites of graphene based materials with metals, alloys, intermetallic compounds and their hydrides, and on the creation on their basis of hydrogen-storage materials for a compact and safe hydrogen storage, electrode materials for nickel- metal hydride batteries, highly efficient catalysts for the hydrogenation ...
Added: December 28, 2021
Tomi M., M.R. Samatov, A.S. Vasenko et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 104 Article 134513
We study, both theoretically and experimentally, the features on the current-voltage characteristic of a highly transparent Josephson junction caused by transition of the superconducting leads to the normal state. These features appear due to the suppression of the Andreev excess current.We show that by tracing the dependence of the voltage, at which the transition occurs, ...
Added: October 24, 2021
Шевчун А. Ф., Tikhonov E., Прокудина М. Г. et al., В кн.: Вторая Международная Конференция «Физика конденсированных состояний».: Российская Академия Наук, 2021. С. 245–246.
Added: October 18, 2021