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Title: Electronic structure of (Ca{sub 0.85}La{sub 0.15})FeAs{sub 2}

We report a comprehensive study of orbital character and tridimensional nature of the electronic structure of (Ca{sub 0.85}La{sub 0.15})FeAs{sub 2} from recently discovered “112” family of Iron-based superconductors (IBS), with angle-resolved photoemission spectroscopy. We observed that the band structure is similar to that of “122” family, namely, there are three hole-like bands at the Brillouin zone (BZ) center and two electron-like bands at the BZ corner. The bands near the Fermi level (E{sub F}) are mainly derived from the Fe t{sub 2g} orbitals. On the basis of our present and earlier studies, we classify IBS into the three types according to their crystal structures. We show that although the bands near E{sub F} mainly originate from Fe 3d electrons, they are significantly modified by the interaction between the superconducting slabs and the intermediate atoms.
Authors:
;  [1] ;  [2] ;  [3] ;  [4] ; ;  [3] ;  [1] ;  [5]
  1. Institute for Solid State Research, IFW Dresden, D-01171 Dresden (Germany)
  2. Diamond Light Source, Didcot OX110DE (United Kingdom)
  3. Department of Applied Chemistry, University of Tokyo, 113-8656 Tokyo (Japan)
  4. (Italy)
  5. (Germany)
Publication Date:
OSTI Identifier:
22420259
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BRILLOUIN ZONES; CALCIUM ALLOYS; CRYSTAL STRUCTURE; ELECTRONIC STRUCTURE; FERMI LEVEL; IRON ARSENIDES; LANTHANUM ALLOYS; PHOTOELECTRON SPECTROSCOPY; SUPERCONDUCTORS