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Composition tunable and stable spontaneous emission and lasing in Cd-alloyed perovskite microdisks
Chemical Communications. 2024. Vol. 60. No. 93. P. 13730–13733.
Tatarinov D., Sapozhnikova E., Khmelevskaia D., Ju Y., Dolgintsev D., Bodyago E., Marunchenko A., Zhukov A., Zhong H., Scheblykin I., Pushkarev A.
All-inorganic Pb–Cd mixed-cation halide perovskites have emerged as semiconductors exhibiting improved optical and optoelectronic properties. We establish a reliable correlation between photoluminescence and Cd content x in bulk CsPb1−xCdxBr3 compositions, propose pathways of photoexcited charge carrier dynamics in them, and show improved stability of lasing in whispering gallery mode microdisks.
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Huang D., Chen Y., Luo X. et al., Chinese Journal of Physics 2026 Vol. 103 P. 1803–1814
Using self-consistent Bogoliubov-de Gennes calculations for kagome flakes framed by armchair
and flat edges, we observe a configuration-dependent spatial inhomogeneity of an 𝑠-wave superconducting
condensate. Specifically, at half-filling, the local pair potential is significantly enhanced
by up to 77.8% at edge centers and up to 148.9% at corners, subsequently boosting their
local critical temperatures by up to 13.5% and ...
Added: September 7, 2026
Marychev P., Shanenko A., Physical Review B: Condensed Matter and Materials Physics 2026 Vol. 114 No. 7 Article 074509
We investigate the effect of weak interband impurity scattering on the intertype (IT) domain between type-I and type-II superconductivity in diffusive two-band superconductors. Our results show that the significant broadening of the IT domain with increasing band diffusivity ratio, previously established in the absence of interband scattering, persists under weak interband scattering. However, depending on ...
Added: September 7, 2026
Denis K., Н. Новгород: Нижегородский государственный университет им. Н.И. Лобачевского, 2025.
В учебном пособии излагаются элементы теории и описание избранных экспериментальных результатов, полученных в активно развивающейся физике топологических изоляторов. Рассмотрены наиболее простые модели поверхностных и краевых состояний в двумерных и трёхмерных топологических изоляторах, их структура в магнитном поле, а также основы топологических методов для определения их свойств. Обсуждаются модели квантовых точек, формируемых в топологических изоляторах. Приведены ...
Added: September 6, 2026
Denis K., Звонков Б. Н., Вихрова О. В. et al., Физика твердого тела 2021 Т. 63 № 9 С. 1245–1252
Сочетанием методов МОС-гидридной эпитаксии и импульсного лазерного нанесения изготовлены гетеронаноструктуры InGaAs/GaAs со слоем (Ga, Mn)As на поверхности, и исследовано влияние воздействия импульсного эксимерного лазера (длина волны 248 nm, длительность импульса ~30 ns, плотность энергии в диапазоне 200-360 mJ/cm2) на их излучательные, структурные и гальваномагнитные свойства. При исследованиях использовалась спектроскопия фотолюминесценции, дополненная возможностью анализа поляризационных характеристик ...
Added: September 6, 2026
Воздействие импульсов эксимерного лазера на светоизлучающие InGaAs/GaAs-структуры с (Ga, Mn)As-слоем
Denis K., Вихрова О. В., Данилов Ю. А. et al., Физика твердого тела 2021 Т. 63 № 3 С. 346–355
Исследована возможность модифицирования лазерным отжигом свойств слоя (Ga, Mn)As, расположенного на поверхности квантово-размерной InGaAs/GaAs-структуры, с сохранением ее излучательных свойств. Для проведения исследований сочетанием методов МОС-гидридной эпитаксии и импульсного лазерного нанесения были изготовлены структуры с четырьмя квантовыми ямами InGaAs/GaAs, (содержание индия от 0.08 до 0.25), расположенными на различном расстоянии от слоя (Ga, Mn)As. В процессе исследований ...
Added: September 6, 2026
Denis K., Lavrukhina E. A., Journal of Physics: Conference Series 2021 Vol. 2103 Article 012201
A model of quasistationary states is constructed for the one-dimensional edge states propagating along the edge of a two-dimensional topological insulator based on HgTe/CdTe quantum well in the presence of magnetic barriers with finite transparency. The lifetimes of these quasistationary states are found analytically and numerically via different approaches including the solution of the stationary ...
Added: September 6, 2026
Denis K., Dorokhin M. V., Ved M. V. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 104 No. 12 Article 125309
The GaAs/InGaAs quantum wells with a ferromagnetic δ〈Mn〉 layer in GaAs barrier demonstrate a set of interesting spin-related phenomena originating from Mn-hole interaction. One of such phenomena is a spin-memory effect which consists of Mn spin polarization induced by interaction with vicinity spin-polarized holes generated under the exposure by short circularly polarized light pulses. Here long Mn ...
Added: September 6, 2026
Denis K., Запруднов Н. А., Физика и техника полупроводников 2022 Т. 56 № 10 С. 973–978
Исследована динамика туннелирования и спина для дырочных состояний в двойной квантовой точке на основе GaAs при наличии сильного спин-орбитального взаимодействия и периодического электрического поля. Рассмотрены режимы туннелирования с переворотом спина в условиях "медленной" эволюции, при которой частота поля меньше остальных энергетических параметров стационарной части гамильтониана. Обнаружено, что в таких условиях туннелирование с переворотом спина может ...
Added: September 6, 2026
Denis K., Kalentyeva I. L., Vikhrova O. V. et al., Journal of Magnetism and Magnetic Materials 2022 Vol. 556 Article 169360
We have investigated the layers of the (Ga,Mn)As diluted magnetic semiconductor with the thickness in the range of 150 – 400 nm, which have been formed by the combination of the methods of a pulsed laser deposition and a post-growth pulsed laser annealing. It has been found that the laser annealing has a significant effect on the structural, ...
Added: September 6, 2026
Denis K., Konakov A. A., Lavrukhina E. A., Journal of Physics: Condensed Matter 2022 Vol. 34 Article 405302
A model of bound state formation from the delocalized edge states of 2D topological insulator (TI) is derived by considering the effects of magnetic barriers attached to the edge of the HgTe/CdTe quantum well. The resulting structure has a spatial form of 1D quantum dot (QD) with variable number of bound states depending on barrier ...
Added: September 6, 2026
Denis K., Studenikin S. A., Physical Review B: Condensed Matter and Materials Physics 2022 Vol. 106 No. 19 Article 195414
Single-spin state evolution induced by the Landau-Zener-Stückelberg-Majorana (LZSM) interference in a Zeeman-spit four-level system in a periodically driven double quantum dot is studied theoretically by the Floquet stroboscopic method. An interplay between spin-conserving and spin-flip tunneling processes with the electric dipole spin resonance (EDSR) that is induced in an individual dot and enhanced by the ...
Added: September 6, 2026
Denis K., Лаврухина Е. А., Тележников А. В., Физика и техника полупроводников 2023 Т. 57 № 7 С. 551–554
Разработана модель локализованных состояний в двойной квантовой точке на крае топологического изолятора на основе квантовой ямы HgTe/CdTe, сформированной тремя магнитными барьерами. Исследованы особенности энергетического спектра, плотности вероятности и спиновой плотности квантовых состояний в зависимости от ориентации векторов намагниченности магнитных барьеров. Изучена локализация волновых функций слева и справа от точки антикроссинга в спектре и сделан вывод ...
Added: September 6, 2026
Denis K., Bastrakova M. V., Munyaev V. O. et al., Physical Review B: Condensed Matter and Materials Physics 2023 Vol. 108 No. 20 Article 205404
Subharmonics of electric dipole spin resonance (EDSR) mediated by Landau-Zener-Stückelberg-Majorana tunneling transitions are studied numerically and analytically in a Zeeman-split four-level system with strong spin-orbit coupling that can be realized, for example, in a GaAs-based double quantum dot in a single-hole regime. The spin qubit is formed in one of the dots and the second ...
Added: September 6, 2026
Taye B. Z., Zhu J., Liu Z. et al., Materials Science and Engineering: R: Reports 2026 Vol. 171 Article 101262
Wide-bandgap (WBG) perovskites used in monolithic tandem solar cells are limited by nonradiative recombination losses and operational instability originating from defect formation during crystallization and their subsequent evolution under illumination. Here, we show that defect formation can be regulated at the precursor stage by coordination chemistry, instead of relying only on post-crystallization passivation. A fluorinated ...
Added: July 1, 2026
Do T. T., Xing J., Liu S. et al., APL Materials 2025 Vol. 13 No. 9 Article 091111
Semiconductor lead halide perovskites have attracted significant attention for various applications. Understanding the impact of material composition on optical properties is essential for optimizing device performance. Here, we performed magneto-optical spectroscopy on high-quality bulk CsPbBr3, MAPbBr3, and MAPbI3 single crystals under magnetic fields of up to 30 T. The results revealed distinctive excitonic responses to the magnetic ...
Added: January 26, 2026
Менушенков А. П., Kagan M., Успехи физических наук 2026 Т. 196 № 1 С. 28–47
Recently, using X-ray free-electron laser radiation, the érst direct experimental evidence of the existence of a real-space paired state of charge carriers was obtained in the parent compound BaBiO3 of the bismuthate family of high-temperature superconductors (HTSCs), whose perovskite-like structure is similar to that of cuprate HTSCs. This conérmed the fundamental premises of our previously ...
Added: January 16, 2026
Li Y., Sun N., Jiang X. et al., Angewandte Chemie - International Edition 2026 Vol. 65 No. 2 Article e12989
Substantial energy loss at the wide-bandgap (WBG) perovskite/fullerene interface poses a fundamental bottleneck for efficient all-perovskite tandem solar cells (APTSCs). Surface defects of WBG perovskite are a known source of non-radiative recombination and have been well-passivated, but this interface still remains with low quasi-Fermi level splitting (QFLS) with considerable voltage loss. Here, we reveal another ...
Added: November 20, 2025
Zarudnyaya A., Segal G., Morozov A. et al., Applied Physics Letters 2025 Vol. 126 No. 26 Article 262106
CsSnI3 perovskite is a thin-film semiconductor with high intrinsic conductivity for various device applications (thermoelectric, photovoltaics, etc.). Stoichiometric CsSnI3 has high-density defects and structural imperfections affecting device performance. In this work, we made an investigation on A-site cation engineering to evaluate the correlation between structural and transport parameters for effective operation in rectifying devices. Here, ...
Added: October 1, 2025
Tan J., Jiang X., Liu D. et al., The Journal of Physical Chemistry Letters 2025 Vol. 16 No. 30 P. 7659–7665
Two-dimensional (2D) Ruddlesden–Popper (RP) perovskites are considered as promising optoelectronic materials due to their intriguing broadband emission properties. However, the origin of the broadband emission in RP perovskites remains a controversial issue. Herein, we have systematically analyzed the exciton behavior and luminescence properties of 2D (PEA)2PbI4. Our calculations demonstrate that 2D (PEA)2PbI4 exhibits significant quantum confinement ...
Added: July 25, 2025
Fu S., Sun N., Hu S. et al., Energy and Environmental Sciences 2025 Vol. 18 No. 11 P. 5503–5510
Substantial VOC loss and halide segregation in wide-bandgap (WBG) perovskite sub-cells pose significant challenges for advancing all-perovskite tandem solar cells (APTSCs). Regarding this, one of the most impactful developments is the application of hole-selective self-assembled monolayers (SAMs), leading to the advancement in APTSC technology. However, SAMs with poor polar-solvent resistance would be inevitably delaminated from ...
Added: May 8, 2025
Yin R., Wu Y., Huang Z. et al., Advanced Functional Materials 2025 Vol. 35 No. 24 Article 2419184
Perovskite solar cells (PSCs) have gained significant attention for their high efficiency, low cost, and versatile application possibilities, which are expected to play a critical role in shaping the future of photovoltaics (PV) markets. However, the power conversion efficiency (PCE) and stability of large-area PSCs still cannot meet the industrialization requirements, which are mainly associated ...
Added: January 24, 2025
Wu Y., Liu D., Chu W. et al., Nanoscale 2025 Vol. 17 No. 4 P. 2224–2234
Metal halide perovskites (MHPs) have attracted strong interest for a variety of applications due to their low cost and excellent performance, attributed largely to favorable defect properties. MHPs exhibit complex dynamics of charges and ions that are coupled in unusual ways. Focusing on a combination of two common MHP defects, i.e., a grain boundary (GB) ...
Added: November 28, 2024
Qiao L., Andrey S. Vasenko, Evgueni V. Chulkov et al., The Journal of Physical Chemistry Letters 2025 Vol. 16 No. 1 P. 215–221
Hybrid lead halide perovskites are promising materials for photovoltaic applications due to their exceptional optoelectronic properties. Here, we investigate the impact of Schottky defects─specifically PbI2(VPbI2) and CH3NH3I (VMAI) vacancies─on nonradiative recombination in CH3NH3PbI3 using time-dependent density functional theory and nonadiabatic (NA) molecular dynamics. Our results reveal that Schottky defects do not alter the fundamental bandgap or ...
Added: November 22, 2024
Anikeeva V., Болдырев Н. Ю., Семенова О. И. et al., Оптика и спектроскопия 2024 Т. 132 № 8 С. 793–799
The paper presents the results of the temperature dependences study of the luminescence spectra (3.6 – 120 K) upon excitation by 405 nm light and of the non-contact measured photoconductivity spectra (3.6 – 300 K) of a CsPbBr3 single crystal. In the low-temperature photoluminescence (PL) spectrum, in addition to the self-trapped exciton line (2.318 eV at 10 K), a rich ...
Added: October 29, 2024