Zobrazeno 1 - 10
of 4 600
pro vyhledávání: '"NIKOLAEV, S"'
Publikováno v:
Zh. Exp. Teor. Fiz. 166, 383 (2024)
Films of metal-insulator nanogranular composites M$_x$D$_{100-x}$ with different compositions and atomic percentage of metal and dielectric phases (M = Fe, Co, Ni, CoFeB; D = Al$_2$O$_3$, SiO$_2$, ZrO$_2$; x $\approx$ 15-60 at.%) are investigated by
Externí odkaz:
http://arxiv.org/abs/2406.04799
Publikováno v:
Physical Review B 110, 205116 (2024)
The exchange interactions in insulators depend on the orbital state of magnetic ions, obeying certain phenomenological principles, known as Goodenough-Kanamori-Anderson rules. Particularly, the ferro order of alike orbitals tends to stabilize antifer
Externí odkaz:
http://arxiv.org/abs/2405.17864
Autor:
Kohsaka, Y., Akutagawa, S., Omachi, S., Iwamichi, Y., Ono, T., Tanaka, I., Tateishi, S., Murayama, H., Suetsugu, S., Hashimoto, K., Shibauchi, T., Takahashi, M. O., Nikolaev, S., Mizushima, T., Fujimoto, S., Terashima, T., Asaba, T., Kasahara, Y., Matsuda, Y.
Single atomic defects are prominent windows to look into host quantum states because collective responses from the host states emerge as localized states around the defects. Friedel oscillations and Kondo clouds in Fermi liquids are quintessential ex
Externí odkaz:
http://arxiv.org/abs/2403.16553
Physics of high-$T_c$ superconducting cuprates is obscured by the effect of strong electronic correlations. One way to overcome the problem is to seek for an exact solution at least within the small cluster and expand it to the whole crystal. Such an
Externí odkaz:
http://arxiv.org/abs/2305.01882
Autor:
Drovosekov, A. B., Kreines, N. M., Ziganurov, D. A., Sitnikov, A. V., Nikolaev, S. N., Rylkov, V. V.
Publikováno v:
J. Exp. Theor. Phys. 137, 562 (2023)
Films of metal-insulator nanogranular composites M$_x$D$_{100-x}$ with different composition and percentage of metal and dielectric phases (M = Fe, Co, CoFeB; D = Al$_2$O$_3$, SiO$_2$, LiNbO$_3$; x $\approx$ 15-70 at.%) are investigated by magnetic r
Externí odkaz:
http://arxiv.org/abs/2305.00551
Ultrafast quantum dynamics relaxation of a photoexcited state in a strongly correlated spin crossover system LaCoO3 under a sudden perturbation is considered with the density matrix generalized master equation. The magnetization and cobalt-oxygen bon
Externí odkaz:
http://arxiv.org/abs/2211.01300
The effects associated with interatomic hoppings of excitons and the excitonic Bose condensate formation in the strongly correlated spin crossover systems are considered in the framework of the effective Hamiltonian for the two-band Kanamori model. T
Externí odkaz:
http://arxiv.org/abs/2206.13821
Autor:
Klokov, A. Yu., Frolov, N. Yu., Sharkov, A. I., Nikolaev, S. N., Chentsov, S. I., Chernopitssky, M. A., Pugachev, M. V., Duleba, A. I., Shupletsov, A. V., Krivobok, V. S., Kuntsevich, A. Yu.
We employ here a picosecond ultrasonic technique to study Van der Waals heterostructures. Temporal variation of the reflection coefficient of the Al film that covers Van der Waals hBN/WSe$_2$/hBN heterostructures on a sapphire substrate after the fem
Externí odkaz:
http://arxiv.org/abs/2111.04598
Autor:
Solovyev, I. V., Nikolaev, S. A., Ushakov, A. V., Irkhin, V. Yu., Tanaka, A., Streltsov, S. V.
Publikováno v:
Physical Review B 105, 014415 (2022)
Based on the density functional theory, we examine the origin of ferromagnetism in the Weyl semimetal Co$_3$Sn$_2$S$_2$ using different types of response theories. We argue that the magnetism of Co$_3$Sn$_2$S$_2$ has a dual nature and bears certain a
Externí odkaz:
http://arxiv.org/abs/2111.02577
Publikováno v:
Phys. Rev. B 104 155153 2021
We consider how electron-phonon interaction influences the insulator-metal transitions driven by doping in the strongly correlated system. Using the polaronic version of the generalized tight-binding method, we investigate a multiband two-dimensional
Externí odkaz:
http://arxiv.org/abs/2105.12438