Erschienen: 23.08.2016 Abbildung von Charnukha | Charge Dynamics in 122 Iron-Based Superconductors | Softcover reprint of the original 1st ed. 2014 | 2016

Charnukha

Charge Dynamics in 122 Iron-Based Superconductors

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Softcover reprint of the original 1st ed. 2014 2016. Buch. xi, 130 S. 19 s/w-Abbildungen, 24 Farbabbildungen, Bibliographien. Softcover

Springer. ISBN 978-3-319-37752-0

Format (B x L): 15,5 x 23,5 cm

Gewicht: 232 g

In englischer Sprache

Das Werk ist Teil der Reihe: Springer Theses

Produktbeschreibung

This thesis combines highly accurate optical spectroscopy data on the recently discovered iron-based high-temperature superconductors with an incisive theoretical analysis. Three outstanding results are reported: (1) The superconductivity-induced modification of the far-infrared conductivity of an iron arsenide with minimal chemical disorder is quantitatively described by means of a strong-coupling theory for spin
fluctuation mediated Cooper pairing. The formalism developed in this thesis also describes prior spectroscopic data on more disordered compounds. (2) The same materials exhibit a sharp superconductivity-induced anomaly for photon energies around 2.5 eV, two orders of magnitude larger than the superconducting energy gap. The author provides a qualitative interpretation of this unprecedented observation, which is based on the multiband nature of the superconducting state. (3) The thesis also develops a comprehensive description of a superconducting, yet optically transparent iron chalcogenide compound. The author shows that this highly unusual behavior can be explained as a result of the nanoscopic coexistence of insulating and superconducting phases, and he uses a combination of two complementary experimental methods - scanning near-field optical microscopy and low-energy muon spin rotation - to directly image the phase coexistence and quantitatively determine the phase composition. These data have important implications for the interpretation of data from other experimental probes.

Gesamtwerk

Die 8. Auflage ist wieder auf sechs Bände angelegt. Darin finden sich übersichtlich und in systematischer Gliederung Vertragsmuster aus der Feder erfahrener Experten. Jedem dieser Muster folgen Anmerkungen, mit denen der dem Vertragsentwurf zu Grunde liegende Sachverhalt und die Gründe für die Wahl des spezifischen Formulars erläutert werden.

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