Titlebook: High-Tc Superconductivity; Experiment and Theor Aleksandr S. Davydov,Vadim M. Loktev Conference proceedings 1992 Springer-Verlag Berlin Hei

Apogee

S. G. Ovchinnikov,O. G. Petrakovsky den Niederlanden, Schweden, Spanien, Großbritannien und Deutschland“im Oktober 2002 vom Fachbereich Politik- und Sozialwissenschaften der Freien Universität Berlin angenommen. Für die Veröffentlichung habe ich sie an einigen Stellen geringfügig überarbeitet. Dass ich die Arbeit schreiben und beende

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V. V. Nemoshkalenko,V. N. Uvarov,A. A. Ereshchenkoer kapitalistischen Produktionsweise alles andere als selbstverständlich ist. Die Möglichkeit von Krisen und in ihrer Folge gesellschaftlicher Desintegration ist vielmehr stets vorhanden. Mit der Frage der Kontinuität, der Krisen und des historischen Wandels des Kapitalismus haben sich im Laufe des

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The Specific Geometry of the CuO2-Plane and Electronic Properties of High-Temperature Superconductoorder parameter and the energy gap of high-.. superconductors are studied using the specific geometry of the CuO.-plane. It is shown that the effects of carrier scattering by the spin fluctuations of the copper subsystem lead to a sharp decrease of the energy gap in the excitation spectrum. The theo

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Energy Band Structure of Strongly Correlated Electrons in a CuO2 Layer,lations both on the Cu and O ions are included explicity. The resulting quasi-particle band structure contains an insulator gap for the undoped compounds like La.CuO.. The valence band consists of a large number of the narrow Hubbard quasi-particle bands. The dispersion law of quasi-particles at the

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The Nature of Unusual Magnetic Properties of Nd,CuO, and Tetragonal Modification of YBa,Cu,O,,of YBa.Cu.O. are presented. The common distinguishing feature of both antiferromagnets is that their total magnetic structure consists of two subsystems with extremely different magnetic properties. In the first compound they are the Cu and Nd magnetic subsystems and in the second one they are two i

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,Temperature Effect in Optical Absorption of Superconducting YBa2Cu3O7-δ Films, 25 to 300 K. The spectra are found to be sensitive to the superconducting transition, and a 1.95eV exciton maximum at low temperatures is observed which can be accounted for by the transition from the near Fermi states. The absorption spectrum freezing at . ≤ . . may be explained assuming a tempera

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