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Two-dimensional semimetal in HgTe quantum well under hydrostatic pressure
Physical Review B: Condensed Matter and Materials Physics. 2018. Vol. 98. No. 15. P. 155437-1–155437-10.
We report results of systematic measurements of charge transport properties of the 20.5-nm-wide HgTe-based quantum well in perpendicular magnetic field, performed under hydrostatic pressures up to 15.1 kbar. At ambient pressure, transport is well described by the two-band semiclassical model. In contrast, at elevated pressure, we observed nonmonotonic pressure dependence of resistivity at the “charge neutrality point.” For pressures lower than ≈9kbar, resistivity grows with pressure, in accord with expectations from the band structure calculations and the model incorporating effects of disorder on transport in two-dimensional (2D) semimetals with indirect band overlap. For higher pressures, the resistivity saturates and starts decreasing upon further increase of pressure. Above ≈14kbar the resistance value and the magnetoresistance character sharply change, which may indicate significant change of electronic structure due to new electronic phase formation or some structural transitions. The data also reveal strong influence of disorder on transport in 2D electron-hole system with a small band overlap.
Сказочкин А. В., Бондаренко Г.Г., Гайдар А. И. et al., Перспективные материалы 2026 № 11 С. 60–75
Рассмотрены механизмы структурно-фазовой перестройки и физико-химические
процессы при формировании износостойких и коррозионно-пассивных покрытий на
чугуне ВЧ40 комбинированной технологией, сочетающей ультразвуковое пластическое
деформирование и электроискровое легирование (ЭИЛ). Образцы модифицировали
ультразвуковым индентором (УЗИ) в среде микрочастиц SiO2 (5 мкм) под давлением
400 МПа с последующим ЭИЛ графитовым и твердосплавным (ВК8) электродом. Структуру,
состав и микротвердость изучали методами сканирующий электронный микроскопии
совмещенной с энергодисперсионной рентгеновской ...
Added: October 16, 2026
Dmitriev A., Kornilov V., Batienkov R., Lecture Notes in Civil Engineering 2026 Vol. 886 P. 249–255
Numerous studies have provided compelling evidence that the probability distribution of avalanche sizes follows a power law, and that 1/f noise is present in the stochastic dynamics of landslides. We present a theoretical explanation of these phenomena within the framework of self-organized criticality theory, proposing a discrete-time model in the form of a sandpile cellular ...
Added: October 13, 2026
Dmitriev A., Shulman I., Lebedev A., Studies in Computational Intelligence 2026 Vol. 1265 P. 266–273
A discrete-time model is presented for the self-organization of the X/Twitter social network to the edge of a phase transition, characterized by avalanche-like propagation of information in the network. The model is based on the analogy between the critical dynamics of the X social network and sandpile cellular automata with Manna rule on the Chung-Lu ...
Added: October 13, 2026
Arutyunov K., Kharitonov I. A., Petrosyants K. O., JETP Letters 2026 Vol. 124 No. 6 P. 1–16
Superconducting properties of metallic micro- and nanowires can be entirely different from those of bulk superconductors. Of particular interest is the nonequilibrium current-induced state of a quasi-one-dimensional superconducting channel. The most interesting phenomenon here is the stepped I–V characteristic, explained by a process known as phase slip center activation. If the origin of such step-like ...
Added: October 13, 2026
Makarov D. M., Kalikin N., Fashchevsky K. A. et al., Electrochimica Acta 2026 Vol. 579 Article 150159
Machine learning (ML) has become a powerful tool for accelerating the development of carbon-based supercapacitors;
however, most published models assume that a single predictive framework can describe both conventional
porous carbons and hybrid carbon electrodes. Here, we test this assumption using a comprehensive
benchmark dataset and an extended literature-curated dataset enriched with synthesis- and electrolyte-related
descriptors. Three ML algorithms ...
Added: October 13, 2026
Махлуф М., Ozhegov R., Elezov M. et al., Фотоника 2026 Vol. 20 No. 6 P. 414–423
This paper compares the ranging precision of direct time-of-flight (dToF) and non-line-of-sight (NLOS) LiDAR architectures, both using a superconducting nanowire single-photon detector (SNSPD). Both systems operate at 1550 nm with a 50 ps pulsed laser and time-correlated single-photon counting (TCSPC). The dToF configuration achieved approximately 100 µm precision at 10 m, while the NLOS configuration achieved 500 µm precision for ...
Added: October 12, 2026
Кондрина К. М., Уродкова Е. К., Senchikhin I. et al., Журнал технической физики 2025 Т. 95 № 3 С. 489–497
Изучение свойств водных дисперсий легированных бором наноалмазов показывает их высокую устойчивость к агрегации и выпадению в осадок по сравнению с детонационными наноалмазами. Легированные бором наноалмазы получены пиролизом 9-борабицикло[3.3.1]нонан димера C16H30B2 под давлением 8−9GPa и температурах 1250 ◦C−1300 ◦С. Оцененная из спектров комбинационного рассеяния света концентрация бора синтезированных наноалмазов составила 1021 cm−3, что соответствует сильному легированию. ...
Added: February 19, 2026
Semenok D., Zhou D., Chen W. et al., Annalen der Physik 2025 Vol. 538 No. 1 Article e00467
We review five years of experimental and theoretical attempts (2020–2025) to enhance the superconducting critical temperature (Tc) of hydrogen-rich compounds by alloying binary superhydrides with additional elements. Despite predictions of higher Tc in ternary systems such as La–Y–H, La–Ce–H, and Ca–Mg–H, experiments consistently show that the maximum Tc in disordered ternary superhydrides does not exceed that of the ...
Added: January 24, 2026
Kulatov E. T., Uspenskii Y. A., K.I. Kugel, Journal of Physics and Chemistry of Solids 2024 Vol. 194 Article 112215
The magnetic doping of Dirac semimetals breaks their time-reversal symmetry thus giving rise to anomalous
transport phenomena promising for applications. While the Dirac cone (DC) manifestations were observed in the
electron transport of (Cd1 xCrx)3As2 alloys up to x = 0.06, their mechanism remains challenging. To address this
challenge, we performed DFT calculations of the (Cd0.96Cr0.04)3As2 alloy with ...
Added: December 29, 2024
Song Y., Chen M., Xie X. et al., Nano Energy 2024 Vol. 127 Article 109763
The stability of the dumbbell structure has been confirmed by previous theory and experiment. Based on first-principles calculations, we proposed hexagonal dumbbell graphene (HDB C10) and rectangular dumbbell graphene (RDB C10) monolayers containing periodically raised C (CR) atoms. They turn out to have high mobility semiconductor properties. By adsorbing H atoms on these CR atoms, ...
Added: May 24, 2024
Kuzovnikov M., Antonov Vladimir E., Kulakov V. et al., PHYSICAL REVIEW MATERIALS 2023 Vol. 7 No. 2 Article 024803
Zirconium trihydride and, for comparison, trideuteride with hexagonal close-packed (hcp) metal lattices
were synthesized at a hydrogen/deuterium pressure of 9 GPa and a temperature of 873 K using toroid-type
high-pressure chambers. After a rapid cooling (quenching) to 100 K and lowering the pressure to atmospheric,
the quenched sample was removed from the chamber and studied by hot extraction ...
Added: February 13, 2024
Tararushkin E., Pisarev V., Kalinichev A. G., Minerals 2023 Vol. 13 No. 3 Article 408
The behavior of brucite over wide ranges of temperatures and pressures is of great interest
for fundamental geochemistry and geophysics. Brucite layers and their octahedral Mg(OH)6 structural
units constitute an important structural part of layered dense magnesium hydrous silicates
(DMHS), which play a major role in mineral equilibria controlling water balance in the subduction
zones of the upper mantle. ...
Added: April 23, 2023
Рыжкин М. И., Рыжкин И. А., Кашин А. М. et al., Письма в Журнал экспериментальной и теоретической физики 2020 Т. 112 № 7-8(10) С. 531–538
The pressure dependence of the proton conductivity of water ice is studied theoretically. It is shown that the decrease in the hydrogen bond length leads to the decrease in the formation energy of ionic defects and to the increase in the formation energy of bond defects. As a result, the partial conductivity of ionic defects, ...
Added: October 31, 2022
Iskrina A., Bobrov A., Spivak A. et al., Journal of Physics and Chemistry of Solids 2022 Vol. 171 Article 111031
Synchrotron-based high-pressure single-crystal X-ray diffraction experiments were conducted on a new CaFe1.2Al0.8O4 phase at ambient temperature and up to a maximum pressure of 61 GPa. Crystals of CaFe1.2Al0.8O4 were synthesized at 24 GPa and 1500 °C. This phase has orthorhombic unit cell parameters (a = 8.9785(1) Å, b = 2.9158(1) Å, c = 10.4253(6) Å, V = 286(3) Å3, Z = 8), crystallizes with a space group Pnma, ...
Added: October 26, 2022
Alexey V. Kuzmin, Meletov K., Salavat S. Khasanov et al., Journal of Physical Chemistry C 2021 Vol. 125 No. 30 P. 16576–16582
The pressure-induced charge transfer in a molecular complex of fullerene with ferrocene, C60·{Fe2+(η5 -C5H5)2•}2, was studied by ab initio calculations, single-crystal X-ray diffraction analysis, and Raman spectroscopy at pressures up to 5.3 GPa. The calculations based on high-pressure crystal structure data, performed by the fragment molecular orbital method and hybrid density functional level chemistry, show ...
Added: October 21, 2022
Alexey V. Kuzmin, Meletov K., Faraonov M., Journal of Physical Chemistry C 2022 Vol. 126 No. 7 P. 3688–3695
X-ray diffraction, optical spectroscopy, and numerical calculations were carried out on pristine ferrocene Fe2+(η5-C5H5)2– single crystals under various pressure/temperature conditions. Structural data were obtained at room temperature and pressures up to 6.5 GPa as well as at ambient pressure and low temperatures up to 100 K. The iron–carbon bond length (l = 2.043 Å under ...
Added: October 21, 2022
Panov D., Bichkov V. Y., Tulenin Y. P. et al., Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques 2021 Vol. 15 No. 6 P. 1264–1269
It is shown that copper films with copper nanowires located on them demonstrate enhancement of the catalytic effect during copper-oxide oxidation. Nanowires of different types (cylindrical and conical ones and arrays between two surfaces) are compared. It is revealed that the largest effect (an increase in the degree of oxidation by 60–70%) is achieved in ...
Added: September 23, 2022
Kovalets N. P., Panov D., Filippova Y. A. et al., Bulletin of the Russian Academy of Sciences: Physics 2021 No. 85 P. 1400–1403
Ni and Fe metal nanowires of different lengths are synthesized in nanoporous matrices of polyethylene terephthalate track membranes. As samples dry, point agglomeration of the ends of the nanowires is observed at lengths corresponding to theoretical estimates. Point contact of nanowires can be used in surface-enhanced Raman scattering (SERS). ...
Added: September 23, 2022
Panov D., Doludenko I. M., Zagorskiy D. L. et al., Поверхность. Рентгеновские, синхротронные и нейтронные исследования 2021 Т. 15 С. 162–167
The dependence of the structure and composition of nanowires made from FeCo and FeNi alloys on the composition of the electrolyte and the conditions of preparation by the method of matrix synthesis is established. FeNi nanowires contain significantly more iron than is contained in the growth solution, while in the case of FeCo, the composition ...
Added: June 28, 2022
V. E. Antonov, Bazhenov A. V., Bashkin I. O. et al., Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques 2020 Vol. 14 No. 5 P. 995–1002
This paper is a brief summary of the results of long-term experimental studies of C60Hx hydrofullerites
with a hydrogen content of up to x ~ 60 or more, obtained by loading C60 fullerites with hydrogen at
pressures up to 9 GPa and temperatures up to 500°C. Basically, this is an overview of already published data.
Some results for ...
Added: November 17, 2021
Zaitsev-Zotov S., Кон И. А., Письма в Журнал экспериментальной и теоретической физики 2020 Т. 111 № 1 С. 45–49
Представлены результаты изучения поперечного магнетосопротивления дираковского полуметалла InBi с узловой линией. Обнаружено, что магнетосопротивление не является квадратичным. В области малых магнитных полей B < 0.1 Тл оно характеризуется повышенной кривизной, в области средних описывается суммой линейного и квадратичного вкладов, а в области больших магнитных полей B > 1 Тл приближается к квадратичному закону с кривизной, в несколько раз меньшей кривизны вблизи нулевого ...
Added: October 28, 2021
Antonov V., Gurev V., Kulakov V. et al., PHYSICAL REVIEW MATERIALS 2019 Vol. 3 No. 11 Article 113604
An isobar x(T) of deuterium solubility in iron is constructed at P = 6.3 GPa and 100 ≤ T ≤ 800 °C based on the results of thermal desorption analysis of FeDx samples produced by quenching under high D2 pressure to the temperature of liquid nitrogen. The experiment confirms the value of x = 0.64 ...
Added: October 24, 2021
Антонов В.Е., Баженов А. В., Башкин И. О. et al., Поверхность. Рентгеновские, синхротронные и нейтронные исследования 2020 № 10 С. 3–11
This paper is a brief summary of the results of long-term experimental studies of C60Hx hydrofullerites
with a hydrogen content of up to x ~ 60 or more, obtained by loading C60 fullerites with hydrogen at
pressures up to 9 GPa and temperatures up to 500°C. Basically, this is an overview of already published data.
Some results for ...
Added: October 24, 2021
Kuzovnikov M., Antonov V., Ivanov A. et al., International Journal of Hydrogen Energy 2021 Vol. 46 No. 39 P. 20630–20639
Powder samples of TaH0.89 and TaD0.96 are synthesized under a hydrogen (deuterium) pressure of 2.8 GPa and a temperature of 250 °C, then quenched to the liquid nitrogen temperature, recovered to ambient pressure and studied by neutron diffraction (ND) and inelastic neutron scattering (INS). The ND study shows that both hydrogen and deuterium atoms occupy ...
Added: October 24, 2021