LEADER 04777nam 22008655 450 001 9910300381903321 005 20200630180518.0 010 $a3-319-01192-8 024 7 $a10.1007/978-3-319-01192-9 035 $a(CKB)2670000000428545 035 $a(EBL)1466759 035 $a(SSID)ssj0001010774 035 $a(PQKBManifestationID)11551946 035 $a(PQKBTitleCode)TC0001010774 035 $a(PQKBWorkID)11000943 035 $a(PQKB)11309525 035 $a(MiAaPQ)EBC1466759 035 $a(DE-He213)978-3-319-01192-9 035 $a(PPN)172423651 035 $a(EXLCZ)992670000000428545 100 $a20130912d2014 u| 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aCharge Dynamics in 122 Iron-Based Superconductors /$fby Aliaksei Charnukha 205 $a1st ed. 2014. 210 1$aCham :$cSpringer International Publishing :$cImprint: Springer,$d2014. 215 $a1 online resource (139 p.) 225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 300 $aDescription based upon print version of record. 311 $a3-319-01191-X 320 $aIncludes bibliographical references. 327 $aIntroduction -- Iron-based superconductors -- Experimental and theoretical methods -- Results and discussion -- Summary. 330 $aThis thesis combines highly accurate optical spectroscopy data on the recently discovered iron-based high-temperature superconductors with an incisive theoretical analysis. Three outstanding results are reported: (1) The superconductivity-induced modification of the far-infrared conductivity of an iron arsenide with minimal chemical disorder is quantitatively described by means of a strong-coupling theory for spin fluctuation mediated Cooper pairing. The formalism developed in this thesis also describes prior spectroscopic data on more disordered compounds. (2) The same materials exhibit a sharp superconductivity-induced anomaly for photon energies around 2.5 eV, two orders of magnitude larger than the superconducting energy gap. The author provides a qualitative interpretation of this unprecedented observation, which is based on the multiband nature of the superconducting state. (3) The thesis also develops a comprehensive description of a superconducting, yet optically transparent iron chalcogenide compound. The author shows that this highly unusual behavior can be explained as a result of the nanoscopic coexistence of insulating and superconducting phases, and he uses a combination of two complementary experimental methods - scanning near-field optical microscopy and low-energy muon spin rotation - to directly image the phase coexistence and quantitatively determine the phase composition. These data have important implications for the interpretation of data from other experimental probes. 410 0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 606 $aSuperconductivity 606 $aSuperconductors 606 $aSpectroscopy 606 $aMicroscopy 606 $aOptical materials 606 $aElectronic materials 606 $aNanoscale science 606 $aNanoscience 606 $aNanostructures 606 $aNanotechnology 606 $aStrongly Correlated Systems, Superconductivity$3https://scigraph.springernature.com/ontologies/product-market-codes/P25064 606 $aSpectroscopy and Microscopy$3https://scigraph.springernature.com/ontologies/product-market-codes/P31090 606 $aOptical and Electronic Materials$3https://scigraph.springernature.com/ontologies/product-market-codes/Z12000 606 $aNanoscale Science and Technology$3https://scigraph.springernature.com/ontologies/product-market-codes/P25140 606 $aNanotechnology$3https://scigraph.springernature.com/ontologies/product-market-codes/Z14000 615 0$aSuperconductivity. 615 0$aSuperconductors. 615 0$aSpectroscopy. 615 0$aMicroscopy. 615 0$aOptical materials. 615 0$aElectronic materials. 615 0$aNanoscale science. 615 0$aNanoscience. 615 0$aNanostructures. 615 0$aNanotechnology. 615 14$aStrongly Correlated Systems, Superconductivity. 615 24$aSpectroscopy and Microscopy. 615 24$aOptical and Electronic Materials. 615 24$aNanoscale Science and Technology. 615 24$aNanotechnology. 676 $a530.41 676 $a537.6 676 $a537.6233 700 $aCharnukha$b Aliaksei$4aut$4http://id.loc.gov/vocabulary/relators/aut$0791352 906 $aBOOK 912 $a9910300381903321 996 $aCharge Dynamics in 122 Iron-Based Superconductors$91768732 997 $aUNINA