P 36 Kiselev, A. I. Peculiarities in the electron structure of aluminum melt leading to low-temperature superconductivity [Текст] / A. I. Kiselev, V. I. Kononenko, L. A. Akashev // Technical Physics. - 2007. - Vol. 52, № 10. - С. 1322-1327. - Библиогр. : с. 1327 (11 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СТРУКТУРА ЭЛЕКТРОННАЯ -- РАСПЛАВЫ -- АЛЮМИНИЙ -- СВЕРХПРОВОДИМОСТЬ -- НИЗКАЯ ТЕМПЕРАТУРА Аннотация: Analysis of experimental optical conductivity dispersion of aluminum alloy reveals that the effects in the electron structure responsible for superconductivity of aluminum at low temperatures are preserved up to the melting point. The co\ction band splitting observed in this case complicates the description of electrical conductivity in the framework of the Drude model. Полный текст |
K 49 Kiselev, A. I. Localized states in melts of light rare-earth metals [Текст] / A. I. Kiselev, L. A. Akashev, V. I. Kononenko // High Temperature (Translation of Teplofizika Vysokikh Temperatur). - 2004. - Vol. 42, № 5. - С. 710-714. - Библиогр. : с. 714 (12 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Based on the results of analysis of the data of optical experiment, equations are suggested for the estimation of the values of electron components of surface energy and of melting heat of metal systems. The results of calculation of these components fo rlight rare-earth metals in the liquid state are given. Полный текст |
K 49 Kiselev, A. I. Optical properties of Al and Al-Ce melts [Текст] / A. I. Kiselev, L. A. Akashev, V. I. Kononenko // Rasplavy. - 2004. - № 4. - С. 67-74 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
K 49 Kiselev, A. I. Collective excitations of ions in rare earth melts [Текст] / A. I. Kiselev, V. I. Kononenko // Rasplavy. - 2007. - № 1. - С. 46-53 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
K 49 Kiselev, A. I. Correlation energy and superconductivity of polyvalent metals [Текст] / A. I. Kiselev, V. I. Kononenko // Metally. - 2006. - № 2. - С. 96-100 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
K 49 Kiselev, A. I. The Optical Properties of Light Rare-Earth Metals in the Liquid State / A. I. Kiselev, V. I. Kononenko, L. A. Akashev // High Temperature (Translation of Teplofizika Vysokikh Temperatur). - 2002. - Vol. 40, № 1. - P. 44-54 : il. - Bibliogr. : p. 53-54 (20 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СВОЙСТВА ОПТИЧЕСКИЕ -- РЗМ -- РЕДКОЗЕМЕЛЬНЫЕ МЕТАЛЛЫ -- ЖИДКИЕ РЗМ Аннотация: The model of almost free electrons is used to analyze the experimentally obtained optical properties of liquid light rare-earth metals (REM) such as lanthanum, cerium, praseodymium, and neodymium. The electrons involved in interband transitions are divided into different groups. In so doing, the contribution by these groups of electrons to the light conductivity is taken into account. The problem of determining partial values of functions is solved in a graphic representation using the method of successive approximations, by variational selection of three parameters, namely, the height of peak, its position, and half-width. It is demonstrated that, in order to explain the experimentally obtained dispersion curves of light conductivity of liquid lanthanum and cerium, it is sufficient to divide the electrons involved in interband transitions into no more than eight groups and, in the case of praseodymium and neodymium, into no more than nine groups. The electron characteristics of these groups of excited states are given Полный текст |
K 49 Kiselev, A. I. Estimation of the Effective Electron Mass in Cerium from the Data of Optical Experiment / A. I. Kiselev, V. I. Kononenko // High Temperature (Translation of Teplofizika Vysokikh Temperatur). - 2003. - Vol. 41, № 6. - P. 771-777 : il. - Bibliogr. : p. 777 (16 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ЖИДКИЕ РЗМ -- ЦЕРИЙ -- ПРОВОДИМОСТЬ ОПТИЧЕСКАЯ -- ПЛОТНОСТЬ Аннотация: The form of the dispersion dependence of the optical conductivity of liquid rare earth metals (REM) in the range of photon energies of about 2 eV is defined by the contribution of the maximum of the density of electron states, which emerges during the Bragg scattering of electrons from the first coordination sphere of a melt. It is shown that, for liquid cerium, the experimental dependence of the optical conductivity in this range of photon energies may be described with due regard for the effective electron mass close to the value of 1.37. It is noted that the inclusion of the effective electron mass in the classical Drude equation for the optical conductivity makes it possible to estimate the value of this parameter on the basis of the data of optical experiment Полный текст |
K 49 Kiselev, A. I. Correlation Energy and the Superconductivity of Polyvalent Metals / A. I. Kiselev, V. I. Kononenko // Russian Metallurgy (Metally). - 2006. - № 4. - P358-362 : il. - Bibliogr. : p. 361-362 (16 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СВЕРХПРОВОДИМОСТЬ -- ПОЛИВАЛЕНТНЫЕ МЕТАЛЛЫ Аннотация: The size effects in the correlation energy of the electron subsystem of metals are found to be related to the superconductivity of polyvalent metals. This relation can be used as a criterion for distinguishing superconducting from nonsuperconducting materials Полный текст |
K 49 Kiselev, A. I. Dynamic and Kinetic Properties of Al–Li Melts / A. I. Kiselev // Russian Journal of Physical Chemistry A. - 2008. - № 6. - P523-528 : il. - Bibliogr. : p. 528 (13 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СПЛАВЫ -- АЛЮМИНИЙ-ЛИТИЙ Аннотация: The dynamic and kinetic properties of Al–Li melts are calculated. The liquid phase of this system is shown to be characterized by three states with different ion distributions and different degrees of electron localization Полный текст |
K 49 Kiselev, A. I. Sound Velocity in Rare Earth Metal Melts in a Collective Excitation Model / A. I. Kiselev // Russian Metallurgy (Metally). - 2010. - № 2. - P84-92 : il. - Bibliogr. : p. 89-90 (14 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СКОРОСТЬ ЗВУКА -- РАСПЛАВЫ -- РЕДКОЗЕМЕЛЬНЫE МЕТАЛЛЫ Аннотация: The dispersion dependences of ion collective vibration frequencies are studied, and the sound velocity and isothermal compressibility are calculated. An alternative approach to calculating the sound velocity is proposed: it is based on the data on the structure of a melt Полный текст |
K 49 Kiselev, A. I. High-Temperature Phase Transitions in Rare-Earth Metals / A. I. Kiselev // Russian Metallurgy (Metally). - 2010. - № 2. - P133-136 : il. - Bibliogr. : p. 136 (15 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ВЫСОКОТЕМПЕРАТУРНЫЕ ПРЕВРАЩЕНИЯ -- РЕДКОЗЕМЕЛЬНЫE МЕТАЛЛЫ Аннотация: The study into the relationship between the laws of structure formation in metallic melts and the properties of collective ion vibrations is continuing. The phase transition temperatures are found from the Lindemann criterion, where the root mean square amplitude of ion vibrations about a center of equilibrium is compared to the properties of the distribution of such centers. In a liquid phase, the vibration amplitude can decrease with increasing temperature Полный текст |
K 49 Kiselev, A. I. Effective Electron Mass in Melts of Aluminum, Cerium, and Al–3 at.% Ce Binary System / A. I. Kiselev, L. A. Akashev, V. I. Kononenko // Technical Physics. - 2004. - Vol. 49, № 3. - P302-305 : il. - Bibliogr. : p. 305 (12 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): РАСПЛАВЫ -- АЛЮМИНИЙ -- ЦЕРИЙ -- ДВОЙНЫЕ СИСТЕМЫ Аннотация: If the effective mass of an electron is taken into account in the Drude classical equation for lightinduced conductivity, the conductivity can be estimated from optical experiment data Полный текст |