Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Kravchenko, L. Yu."'
Autor:
Kravchenko, L. Yu., Fil, D. V.
An influence of Mg and Si dopants on the formation energies and the concentration of point defects in yttrium aluminum garnet (YAG) is studied using the density functional approach. The formation energies of Mg and Si substitutional and interstitial
Externí odkaz:
http://arxiv.org/abs/2301.05170
Autor:
Kravchenko, L. Yu., Fil, D. V.
Publikováno v:
Physical Review Research 2, 023135 (2020)
We study mechanisms of control of charge state and concentration of different point defects in doped insulating crystals. The approach is based on the density functional theory calculations. We apply it to the problem of obtaining of Ti-doped sapphir
Externí odkaz:
http://arxiv.org/abs/2011.10419
Autor:
Kravchenko, L. Yu., Fil, D. V.
Publikováno v:
Journal of Applied Physics 123, 023104 (2018)
First-principles calculations have been performed to study the formation of defect complexes in Ti doped alpha-Al2O3 crystals. The formation energies of isolated Ti3+ and Ti4+ defects, pairs, triples and quadruples of Ti ions and Al vacancies are com
Externí odkaz:
http://arxiv.org/abs/1708.08850
Superconductivity of electron-hole pairs in a bilayer graphene system in a quantizing magnetic field
Autor:
Fil, D. V., Kravchenko, L. Yu.
Publikováno v:
Low Temp. Phys v. 35(8-9), 712-723 (2009)
The state with a spontaneous interlayer phase coherence in a graphene based bilayer quantum Hall system is studied. This state can be considered as a gas of superfluid electron-hole pairs with the components of the pair belonging to different layers.
Externí odkaz:
http://arxiv.org/abs/0912.4432
Autor:
Fil, D. V., Kravchenko, L. Yu.
Publikováno v:
AIP Conf. Proc. 1198, 34 (2009)
The possibility of realization of a superfluid state of bound electron-hole pairs (magnetoexcitons) with spatially separated components in a graphene double layer structure (two graphene layers separated by a dielectric layer) subjected by a strong p
Externí odkaz:
http://arxiv.org/abs/0906.2661
Autor:
Kravchenko, L. Yu., Fil, D. V.
Publikováno v:
J Low Temp Phys 155 (2009), 219 - 234
A stationary wave pattern occurring in a flow of a two-component Bose-Einstein condensate past an obstacle is studied. We consider the general case of unequal velocities of two superfluid components. The Landau criterium applied to the two-component
Externí odkaz:
http://arxiv.org/abs/0811.2436
Autor:
Kravchenko, L. Yu., Fil, D. V.
Publikováno v:
J. Phys.: Condens. Matter 20 (2008) 325235
Superfluid properties of electron-hole pairs in a quantum Hall four-layer system are investigated. The system is considered as a solid state realization of a two-component superfluid Bose gas with dipole-dipole interaction. One superfluid component i
Externí odkaz:
http://arxiv.org/abs/0807.0736
Autor:
Kravchenko, L. Yu., Fil, D. V.
Publikováno v:
J. Low. Temp. Phys., 150, 612(2008)
On the ground of the Landau criterion we study the behavior of critical velocities in a superfluid two-component Bose gas. It is found that under motion of the components with different velocities the velocity of each component should not be lower th
Externí odkaz:
http://arxiv.org/abs/0807.0726
Autor:
Kravchenko, L. Yu., Fil, D. V.
Publikováno v:
Journal of Applied Physics; 2018, Vol. 123 Issue 2, p1-N.PAG, 11p
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