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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Gizhevskii B. A., Sukhorukov Y. P., Ermakov A. E., Uimin M. A., Kozlov E. A., Kotov Y. A., Bagazeev A. V.
Заглавие : Specific features of the electronic structure and optical spectra of nanoparticles with strong electron correlations
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2007. - Vol. 49, Is. 6. - P1116-1120. - ISSN 1063-7834, DOI 10.1134/S1063783407060169
Примечания : Cited References: 18. - This study was supported by the Russian Academy of Sciences within the program "Strong Electron Correlations", the Integration Project of the Siberian Division–Ural Division of the Russian Academy of Sciences (project no. 74), the Federal Agency for Science and Innovation (contract no. 02.434.11.7048), the Russian Foundation for Basic Research (project no. 06-03-32943), and the Branch of General Physics and Astronomy of the Russian Academy of Sciences and the Presidium of the Ural Division of the Russian Academy of Sciences within the program "New Materials and Structures"
Предметные рубрики: CUO
ABSORPTION
STATES
Аннотация: Analysis of the experimental optical spectra of CuO nanoparticles with the electronic structure characterized by strong electron correlations has revealed the appearance of unusual states inside the band gap. The intragap states an the specific features of the electronic structure of CuO nanoparticles are discussed in the framework of the generalized tight-binding method previously developed for describing the electronic structure of superconducting cuprates.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Gohfeld D. M., Popkov S. I., Saihutdinov K. A., Petrov M. I.
Заглавие : High-temperature superconductor based composites: Large magnetoresistance in weak magnetic fields
Место публикации : Tech. Phys. Lett.: AMER INST PHYSICS, 2001. - Vol. 27, Is. 11. - P952-955. - ISSN 1063-7850, DOI 10.1134/1.1424404
Примечания : Cited References: 16
Предметные рубрики: CRITICAL CURRENTS
APPLICABILITY
TRANSITION
TRANSPORT
SYSTEM
CUO
Аннотация: It was found that high-temperature superconductor (HTSC) based composites of the 1-2-3 (YBCO) + dielectric and YBCO + normal metal types exhibit large magnetoresistances in weak magnetic fields in a broad temperature range. This behavior is qualitatively explained using the concept of the irreversibility line in HTSCs and the mechanism of thermal fluctuations in the network of weak bonds of the Josephson type realized in HTSC composites. The HTSC-based composites exhibit a much higher sensitivity (as compared to that in the usual HTSC ceramics) to weak magnetic fields (below 300 Oe) at liquid-nitrogen temperatures, which is important for practical applications. (C) 2001 MAIK "Nauka /Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Shaikhutdinov K. A., Ovchinnikov S. G.
Заглавие : Influence of magnetic scattering centers in the insulator component of the composite HTSC+Cu1-xNixO on its resistive properties
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 1998. - Vol. 40, Is. 9. - P1451-1455. - ISSN 1063-7834, DOI 10.1134/1.1130601
Примечания : Cited References: 31
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTORS
PLUS SEMICONDUCTOR
CUO
Аннотация: We present results of an experimental study of the effect of magnetic scattering centers (nickel) in the insulator component (cuprous oxide) of the composite HTSC+Cu1-xNixO on its transport properties. A suppression of the superconducting properties of this system is observed to take place with increasing nickel content. The results are analyzed within the framework of the model of strong electron correlations. (C) 1998 American Institute of Physics. [S1063-7834(98)00609-1].
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