High-temperature superconductivity in cuprates : the by A. Mourachkine PDF

By A. Mourachkine

ISBN-10: 0306480638

ISBN-13: 9780306480638

“The Frontiers of Knowhledge (to coin a word) are continuously at the movement. - day’s discovery will the following day be a part of the psychological furnishings of each learn employee. by means of the tip of subsequent week it will likely be in each process graduate lectures. in the month there'll be a clamour to have it within the undergraduate c- riculum. subsequent yr, I do think, it's going to appear so typical that it can be assumed to be identified by means of each schoolboy. “The means of advancing the road of settlements, and cultivating and c- ilizing the hot territory, happens in levels. the unique papers are p- lished, to the satisfaction in their authors, and to the serious eyes in their readers. overview articles then offer crude comic strip plans, undemanding publications during the forests of the literature. Then come the monographs, particular surveys, mapping out the floor that has been gained, adjusting claims for precedence, placing each one truth or concept into its position” (J. M. Ziman, ideas of the idea of Solids (Cambridge collage Press, 1972) p.v). the most function of the ebook is to offer the mechanism of - perconductivity chanced on in 1986 by way of J. G. Bednorz and ok. A. Müller, and to debate the physics of superconductors. The final bankruptcy of the publication offers research of tunneling measurements in cuprates. The publication is - dressed to researchers and graduate scholars in all branches of tangible sciences.

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Extra info for High-temperature superconductivity in cuprates : the nonlinear mechanism and tunneling measurements

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2 A. 8 K). s absent because oí the large value of ihe normal resistance of the junction, ftn ~ t00iwni7]. 21) where e is the electron charge, and A(0) is the energy gap at T- 0. Tlie product IcRn is known as the Josephson product Tlie temperature dependence of the Josephson product is similar to the temperature dependence of the energy gap. 5 A n d r e e v reflections In an SlNju notion, in tunneling regime, the normal resistance of thejunction R,n is usually high ( ^ MQ). Tunneling can still be observed injunctions with Rn ~ 10(1-Si.

In YBCOr» there are no Cu-O chains, and the compound Is an antiferromagnetic insulator, as shown in Fig. 5. It has to be doped to gradually become a metallic conductor and a superconductor at low temperature. The doping Is achieved by adding additional oxygen atoms which form the Cu-O chains. 0 simply by pumping oxygen In and out of the parallel CuO chains running along the b axis. Thus, the CuO chains play the role of charge reservoirs. 0, the lattice parameters a ^ b, and the unit cell is orthorhombic.

Transverse ultrasound measurements are even able to probe the presence of electronic gap nodes in a superconductor. Ultrasound waves are scattered in a superconductor by normal electrons, not by Cooper pairs, so that their attenuation is a measure of the fraction of normal electrons. As a consequence, superconductors absorb sound waves more weakly than normal metals. The ratio of the attenuation measured in conventional superconductors indeed follows the prediction of the BCS theory, confirming the validity of the principal ideas of the theory.

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High-temperature superconductivity in cuprates : the nonlinear mechanism and tunneling measurements by A. Mourachkine


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