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[null,"1.","Record Nr.",null,"UNINA9910300381903321"]
[null,null,"Autore",null,"Charnukha Aliaksei"]
[null,null,"Titolo",null,"Charge Dynamics in 122 Iron-Based Superconductors / / by Aliaksei Charnukha"]
[null,null,"Pubbl/distr/stampa",null,"Cham : , : Springer International Publishing : , : Imprint : Springer, , 2014"]
[null,null,"ISBN",null,"3-319-01192-8"]
[null,null,"Edizione",null,"[1st ed. 2014.]"]
[null,null,"Descrizione fisica",null,"1 online resource (139 p.)"]
[null,null,"Collana",null,"Springer Theses, Recognizing Outstanding Ph.D. Research, , 2190-5053"]
[null,null,"Disciplina",null,"530.41"]
[{"$nulls":4},"537.6"]
[{"$nulls":4},"537.6233"]
[null,null,"Soggetti",null,"Superconductivity"]
[{"$nulls":4},"Superconductors"]
[{"$nulls":4},"Spectroscopy"]
[{"$nulls":4},"Microscopy"]
[{"$nulls":4},"Optical materials"]
[{"$nulls":4},"Electronic materials"]
[{"$nulls":4},"Nanoscale science"]
[{"$nulls":4},"Nanoscience"]
[{"$nulls":4},"Nanostructures"]
[{"$nulls":4},"Nanotechnology"]
[{"$nulls":4},"Strongly Correlated Systems, Superconductivity"]
[{"$nulls":4},"Spectroscopy and Microscopy"]
[{"$nulls":4},"Optical and Electronic Materials"]
[{"$nulls":4},"Nanoscale Science and Technology"]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Note generali","Description based upon print version of record."]
[null,null,null,"Nota di bibliografia","Includes bibliographical references."]
[null,null,"Nota di contenuto",null,"Introduction -- Iron-based superconductors -- Experimental and theoretical methods -- Results and discussion -- Summary."]
[null,null,null,"Sommario/riassunto","This thesis combines highly accurate optical spectroscopy data on the recently discovered iron-based high-temperature superconductors with an incisive theoretical analysis. Three outstanding results are reported: (1) The superconductivity-induced modification of the far-infrared conductivity of an iron arsenide with minimal chemical disorder is quantitatively described by means of a strong-coupling theory for spin "]
[{"$nulls":4},"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."]