000 03417nam a22005055i 4500
001 978-3-319-01192-9
003 DE-He213
005 20140220082508.0
007 cr nn 008mamaa
008 130912s2014 gw | s |||| 0|eng d
020 _a9783319011929
_9978-3-319-01192-9
024 7 _a10.1007/978-3-319-01192-9
_2doi
050 4 _aQC611.9-611.98
072 7 _aTJFD5
_2bicssc
072 7 _aTEC039000
_2bisacsh
072 7 _aSCI021000
_2bisacsh
082 0 4 _a530.41
_223
100 1 _aCharnukha, Aliaksei.
_eauthor.
245 1 0 _aCharge Dynamics in 122 Iron-Based Superconductors
_h[electronic resource] /
_cby Aliaksei Charnukha.
264 1 _aCham :
_bSpringer International Publishing :
_bImprint: Springer,
_c2014.
300 _aXI, 130 p. 43 illus., 24 illus. in color.
_bonline resource.
336 _atext
_btxt
_2rdacontent
337 _acomputer
_bc
_2rdamedia
338 _aonline resource
_bcr
_2rdacarrier
347 _atext file
_bPDF
_2rda
490 1 _aSpringer Theses, Recognizing Outstanding Ph.D. Research,
_x2190-5053
505 0 _aIntroduction -- Iron-based superconductors -- Experimental and theoretical methods -- Results and discussion -- Summary.
520 _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.
650 0 _aPhysics.
650 0 _aOptical materials.
650 0 _aNanotechnology.
650 1 4 _aPhysics.
650 2 4 _aStrongly Correlated Systems, Superconductivity.
650 2 4 _aSpectroscopy and Microscopy.
650 2 4 _aOptical and Electronic Materials.
650 2 4 _aNanoscale Science and Technology.
650 2 4 _aNanotechnology.
710 2 _aSpringerLink (Online service)
773 0 _tSpringer eBooks
776 0 8 _iPrinted edition:
_z9783319011912
830 0 _aSpringer Theses, Recognizing Outstanding Ph.D. Research,
_x2190-5053
856 4 0 _uhttp://dx.doi.org/10.1007/978-3-319-01192-9
912 _aZDB-2-PHA
999 _c92605
_d92605