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Author Charnukha, Aliaksei,
Title Charge dynamics in 122 iron-based superconductors / Aliaksei Charnukha.
Imprint Cham : Springer, [2013?]
2014

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 OHIOLINK SPRINGER EBOOKS    ONLINE  
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LOCATION CALL # STATUS MESSAGE
 OHIOLINK SPRINGER EBOOKS    ONLINE  
View online
Author Charnukha, Aliaksei,
Series Springer theses, 2190-5053
Springer theses. 2190-5053
Subject Iron-based superconductors -- Optical properties.
Description 1 online resource (xi, 130 pages) : illustrations (some color).
polychrome rdacc
Thesis Ph. D. University of Stuttgart (2013?)
Contents Introduction -- Iron-based superconductors -- Experimental and theoretical methods -- Results and discussion -- Summary.
Bibliography Note Includes bibliographical references.
Summary 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.
Note Online resource; title from PDF title page (SpringerLink, viewed September 16, 2013).
ISBN 9783319011929 (electronic bk.)
3319011928 (electronic bk.)
9783319011912
ISBN/ISSN 10.1007/978-3-319-01192-9
OCLC # 859316634
Additional Format Printed edition: 9783319011912


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