Vai al contenuto principale della pagina
Autore: | Charnukha Aliaksei |
Titolo: | Charge Dynamics in 122 Iron-Based Superconductors / / by Aliaksei Charnukha |
Pubblicazione: | Cham : , : Springer International Publishing : , : Imprint : Springer, , 2014 |
Edizione: | 1st ed. 2014. |
Descrizione fisica: | 1 online resource (139 p.) |
Disciplina: | 530.41 |
537.6 | |
537.6233 | |
Soggetto topico: | Superconductivity |
Superconductors | |
Spectroscopy | |
Microscopy | |
Optical materials | |
Electronic materials | |
Nanoscale science | |
Nanoscience | |
Nanostructures | |
Nanotechnology | |
Strongly Correlated Systems, Superconductivity | |
Spectroscopy and Microscopy | |
Optical and Electronic Materials | |
Nanoscale Science and Technology | |
Note generali: | Description based upon print version of record. |
Nota di bibliografia: | Includes bibliographical references. |
Nota di contenuto: | Introduction -- Iron-based superconductors -- Experimental and theoretical methods -- Results and discussion -- Summary. |
Sommario/riassunto: | 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. |
Titolo autorizzato: | Charge Dynamics in 122 Iron-Based Superconductors |
ISBN: | 3-319-01192-8 |
Formato: | Materiale a stampa |
Livello bibliografico | Monografia |
Lingua di pubblicazione: | Inglese |
Record Nr.: | 9910300381903321 |
Lo trovi qui: | Univ. Federico II |
Opac: | Controlla la disponibilità qui |