?
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
Gayduchenko I., Xu S. G., Alymov G. et al., Nature Communications 2021 Vol. 12 No. 1 Article 543
The rectification of electromagnetic waves to direct currents is a crucial process for energy harvesting, beyond-5G wireless communications, ultra-fast science, and observational astronomy. As the radiation frequency is raised to the sub-terahertz (THz) domain, ac-to-dc conversion by conventional electronics becomes challenging and requires alternative rectification protocols. Here, we address this challenge by tunnel field-effect transistors ...
Added: September 27, 2021
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
Andrianov E. S., Zyablovsky A. A., Dorofeenko A. V. et al., Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 98 No. 07-5411 P. 075411-1-075411-8
Plasmon spectroscopy methods are highly sensitive to the small volumes of material due to subwavelength localization of light increasing light-matter interaction. Recent research has shown a high potential of plasmon quantum generator (spaser) or amplifier (sped) for sensing in the infrared optical region. Trinitrotoluene (TNT) molecules fingerprints are considered as an example. Basing on Lindblad ...
Added: October 22, 2018
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
Кулешов В. М., Нарожный Н. Б., Федотов А. М. et al., Письма в Журнал экспериментальной и теоретической физики 2015 Т. 101 № 4 С. 282-288
Рассмотрены свойства носителей заряда в графене на подложке SiC, допированном примесью с зарядом Z. Для модифицированного на малых расстояниях кулоновского потенциала получены замкнутые аналитические уравнения, определяющие спектр носителей. Определены критические значения заряда Zcr, при которых уровень с данными квантовыми числами достигает границы валентной зоны. При Z<Zcr для низших значений орбитального момента получена зависимость положения уровня ...
Added: October 22, 2015
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
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
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
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
Alexey A. Sokolik, Yurii E. Lozovik, Physical Review B: Condensed Matter and Materials Physics 2019 Vol. 100 No. 12 P. 125409-1-125409-8
Magnetoplasmons on graphene edges in quantizing magnetic fields are investigated at different Landau-level filling factors. To find the mode frequency, the optical conductivity tensor of disordered graphene in a magnetic field is calculated in the self-consistent Born approximation, and the nonlocal electromagnetic problem is solved using the Wiener-Hopf method. Magnetoplasmon dispersion relations, velocities, and attenuation ...
Added: October 18, 2019
Yu.E. Lozovik, Nechepurenko I. A., Dorofeenko A. V., Photonics and Nanostructures - Fundamentals and Applications 2016 Vol. 21 P. 60-66
We propose an intracavity plasmon absorption spectroscopy method based on graphene active plasmonics. It is shown that the plasmonic cavity contribution to the sensitivity is proportional to the quality factor Q of the graphene plasmonic cavity and reaches two orders of magnitude. The addition of gain medium into the cavity increases the sensitivity of method. ...
Added: October 18, 2016
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
Siahlo A., Popov A., Poklonski N. et al., Physica E: Low-Dimensional Systems and Nanostructures 2020 Vol. 115 P. 113645-1-113645-6
The scheme and operational principles of graphene-based nanoelectromechanical system (NEMS) for study of interaction between graphene and surface of a sample is proposed. In such a NEMS multilayer graphene membrane bends due to van der Waals attraction between surface of graphene membrane and surface of a sample attached to a manipulator. An analysis of the ...
Added: October 30, 2020
Нечепуренко И. А., Дорофеенко А. В., Ю.Е. Лозовик, Журнал радиоэлектроники 2015 № 12 С. 1-17
В данной работе рассмотрен поверхностный плазмон-поляритонный лазер (спазер), который генерирует поверхностные плазмоны в графеновой чешуйке. Произведен пересмотр основных лазерных уравнений для описания спазера с учетом дисперсии материальных параметров. Выполнен последовательный вывод уравнений динамики спазера, начиная с уравнений Максвелла-Блоха. Получены уравнения динамики спазера в одномодовом приближении и скоростные уравнения. Найдены выражения для параметров уравнений через физические ...
Added: October 18, 2016
Yu.E. Lozovik, Огарков С. Л., A.A. Sokolik, Physical Review B: Condensed Matter and Materials Physics 2012 Vol. 86 No. 04-5429 P. 1-6
Condensation of pairs formed by spatially separated electrons and holes in a system of two isolated graphene layers is studied beyond the mean-field approximation. Suppression of the screening of the pairing interaction at large distances, caused by the appearance of the gap, is considered self-consistently. A mutual positive feedback between the appearance of the gap ...
Added: March 14, 2013
Kuntsevich A., Shupletsov A. V., Minkov G. M., Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 97 P. 195431-1-195431-8
The phase of quantum magneto-oscillations is often associated with the Berry phase and is widely used to
argue in favor of topological nontriviality of the system (Berry phase 2πn + π). Nevertheless, the experimentally
determined value may deviate from 2πn + π arbitrarily, therefore more care should be made analyzing the
phase of magneto-oscillations to distinguish trivial systems ...
Added: September 10, 2018
Burmistrov I., Gornyi I. V., Kachorovskii V. Y. et al., Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 97 No. 125402 P. 125402-1-125402-19
We demonstrate that a key elastic parameter of a suspended crystalline membrane—the Poisson ratio (PR) ν—is a nontrivial function of the applied stress σ and of the system size L, i.e., ν=νL(σ). We consider a generic two-dimensional membrane embedded into space of dimensionality 2+dc. (The physical situation corresponds to dc=1.) A particularly important application of our results is to freestanding graphene. We ...
Added: June 6, 2018
Kagan M. Yu., Val’kov V. V., Mitskan V. A. et al., Solid State Communications 2014 Vol. 188 P. 61-66
Idealized graphene monolayer is considered neglecting the van der Waals potential of the substrate and the role of the nonmagnetic impurities. The effect of the long-range Coulomb repulsion in an ensemble of Dirac fermions on the formation of the superconducting pairing in a monolayer is studied in the framework of the Kohn–Luttinger mechanism. The electronic ...
Added: April 1, 2015
Kovaleva N. N., Chvostova D., Potůčhek Z. et al., 2D Materials 2019 Vol. 6 No. 4 P. 045021-1-045021-10
Plasma functionalization of graphene is one of the facile ways to tune its doping level without the
need for wet chemicals making graphene photoluminescent. Microscopic corrugations in the twodimensional
structure of bilayer CVD graphene having a quasi-free-suspended top layer, such as
graphene ripples, nanodomes, and bubbles, may significantly enhance local reactivity leading to
etching effects on exposure to plasma. ...
Added: October 21, 2019
Lozovik Y., Nechepurenko I. A., Andrianov E. S. et al., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 94 No. July P. 035406
The development of active and passive plasmonic devices is challenging due to the high level of dissipation in normal metals. One possible solution to this problem is using alternative materials. Graphene is a good candidate for plasmonics in the near-infrared region. In this paper, we develop a quantum theory of a graphene plasmon generator. We account for quantum correlations ...
Added: September 14, 2016
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
Evlashin S., Fedorov F. S., Dyakonov P. V. et al., The Journal of Physical Chemistry Letters 2020 Vol. 11 No. 12 P. 4859-4865
Supercapacitors based on carbon nanomaterials are attracting much attention because of their high capacitance enabled by large specific surface area. The introduction of heteroatoms such as N or O enhances the specific capacitance of these materials. However, the mechanisms that lead to the increase in the specific capacitance are not yet well-studied. In this Letter, we ...
Added: June 4, 2020
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
Alexey A. Sokolik, Yurii E. Lozovik, Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 97 No. 07-5416 P. 1-8
Renormalization of Landau level energies in graphene in strong magnetic field due to Coulomb interaction is studied theoretically, and calculations are compared with two experiments on carrier-density dependent scanning tunneling spectroscopy. An approximate preservation of the square-root dependence of the energies of Landau levels on their numbers and magnetic field in the presence of the ...
Added: November 28, 2017