Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Varonov, A. M."'
Autor:
Varonov, Albert M., Mishonov, Todor M.
An initial theoretical attempt to explain the observed decrease of the polytropic/adiabatic index $\gamma$ in the solar corona has been accomplished. The chemical reactions of the ionization-recombination processes in local thermodynamic equilibrium
Externí odkaz:
http://arxiv.org/abs/2312.14759
The well-known Pavarini et al. [Phys. Rev. Lett. 87, 047003 (2001)] correlation between the critical temperature $T_c$, max and the shape of the Fermi contour of the optimally hole-doped cuprates are explained within the framework of the BCS theory w
Externí odkaz:
http://arxiv.org/abs/2303.18235
Publikováno v:
SN Appl. Sci. Vol. 4, 228 (2022)
We analyze the conditions for observation of zero sound in layered perovskites with transition metal ion on chalcogenide oxidizer. We conclude that propagation of zero sound is possible only for anti-ferromagnetic sign of the $s$-$d$ interaction. If
Externí odkaz:
http://arxiv.org/abs/2208.00938
Publikováno v:
SN Appl. Sci. Vol. 4, 242 (2022)
We perform a thorough theoretical study of the electron properties of a generic CuO$_2$ plane in the framework of Shubin-Kondo-Zener $s$-$d$ exchange interaction that simultaneously describes the correlation between $T_c$ and the Cu4$s$ energy. To th
Externí odkaz:
http://arxiv.org/abs/2208.00936
Publikováno v:
Eur. J. Phys. 43 035103 (2022)
We describe a set-up for measurement of the absolute zero by Johnson-Nyquist thermal noise which can be performed within a week in every high-school or university. Necessary electronic components and technical guidelines for the construction of this
Externí odkaz:
http://arxiv.org/abs/2205.06609
The anisotropy of the electron scattering rate and lifetime $\Gamma_\mathbf{p}=1/\tau_\mathbf{p}$ observed by Angle Resolved Photoemission Spectroscopy (ARPES) is evaluated using $s$-$d$ Kondo-Zener exchange Hamiltonian used previously to describe su
Externí odkaz:
http://arxiv.org/abs/2111.06716
Autor:
Mishonov, T. M., Petkov, A. P., Andreoni, M., Petkov, E. G., Varonov, A. M., Dimitrova, I. M., Velkoska, L., Popeski-Dimovski, R.
Publikováno v:
Nat. Sci. Adv. Technol. Educ., vol. 30, issue 3 (2021)
This is the problem of the 8$^\mathrm{th}$ International Experimental Physics Olympiad (EPO). The task of the EPO8 is to determine Plank constant $\hbar=h/2\pi$ using the given set-up with LED. If you have an idea how to do it, do it and send us the
Externí odkaz:
http://arxiv.org/abs/2106.01337
Autor:
Mifune, T., Mishonov, T. M., Serafimov, N. S., Dimitrova, I. M., Popeski-Dimovski, R., Velkoska, L., Petkov, E. G., Varonov, A. M., Barone, A.
Publikováno v:
Rev. Sci. Instrum. Vol. 92, 025123 (2021)
For the need of measurements focused in condensed matter physics and especially Bernoulli effect in superconductors we have developed an active resonator with dual operational amplifiers. A tunable high-Q resonator is performed in the schematics of t
Externí odkaz:
http://arxiv.org/abs/2105.11536
Publikováno v:
Eur. J. Phys. Vol. 42 045502 (2021)
The effective mass of a magnon in a neodymium magnet is evaluated using Bloch temperature dependence of spontaneous magnetization. We used the Hall effect magnetometer and thermo-couple thermometer for measuring of the temperature of the water in whi
Externí odkaz:
http://arxiv.org/abs/2010.11229
Autor:
Mishonov, Todor M., Varonov, Albert M.
Publikováno v:
J. Phys.: Conf. Ser. 1762, 012013 (2021)
We describe electronic instruments for creation of effective Cooper pair spectroscopy. The suggested spectroscopy requires study of electric field effects on the surface of cleaved superconductors. The electronic instrument reacquires low noise ampli
Externí odkaz:
http://arxiv.org/abs/2009.12315