| Description |
1 online resource (xi, 130 pages) : illustrations (some color) |
| Series |
Springer theses, 2190-5053 |
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Springer theses, 2190-5053
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| Contents |
Introduction -- Iron-based superconductors -- Experimental and theoretical methods -- Results and discussion -- Summary |
| 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 |
| Analysis |
Strongly Correlated Systems, Superconductivity |
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Spectroscopy and Microscopy |
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Optical and Electronic Materials |
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Nanoscale Science and Technology |
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Nanotechnology |
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Physics |
| Notes |
Ph. D. University of Stuttgart (2013?) |
| Bibliography |
Includes bibliographical references |
| Notes |
Online resource; title from PDF title page (SpringerLink, viewed September 16, 2013) |
| Subject |
Iron-based superconductors -- Optical properties
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SCIENCE -- Physics -- Electricity.
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SCIENCE -- Physics -- Electromagnetism.
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Physique.
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Astronomie.
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Nanotechnology
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Optical materials
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Physics
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| Genre/Form |
doctoral dissertations.
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theses.
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dissertations.
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masters theses.
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Academic theses
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Academic theses.
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Thèses et écrits académiques.
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| Form |
Electronic book
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| ISBN |
9783319011929 |
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3319011928 |
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