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Title: Angle-resolved photoemission observation of Mn-pnictide hybridization and negligible band structure renormalization in BaMn2As2 and BaMn2Sb2

We performed an angle-resolved photoemission spectroscopy study of BaMn2As2 and BaMn2Sb2, which are isostructural to the parent compound BaFe2As2 of the 122 family of ferropnictide superconductors. We show the existence of a strongly kz-dependent band gap with a minimum at the Brillouin zone center, in agreement with their semiconducting properties. Despite the half filling of the electronic 3d shell, we show that the band structure in these materials is almost not renormalized from the Kohn-Sham bands of density functional theory. Finally, our photon-energy-dependent study provides evidence for Mn-pnictide hybridization, which may play a role in tuning the electronic correlations in these compounds.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [4] ;  [5] ;  [6] ;  [1] ;  [1] ;  [1] ;  [1] ;  [7] ;  [8] ;  [7] ;  [9] ;  [10] ;  [2]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  3. Chinese Academy of Sciences (CAS), Beijing (China); Univ. Paris-Saclay, Palaiseau (France); CEA, LITEN, Grenoble (France)
  4. Chinese Academy of Sciences (CAS), Beijing (China); Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  5. Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Tokyo, Chiba (Japan)
  6. Chinese Academy of Sciences (CAS), Beijing (China); Brookhaven National Lab. (BNL), Upton, NY (United States)
  7. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  8. Chinese Academy of Sciences (CAS), Beijing (China); Princeton Univ., Princeton, NJ (United States)
  9. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  10. Univ. Paris-Saclay, Palaiseau (France); College de France, Paris (France); European Theoretical Synchrotron Facility (France)
Publication Date:
OSTI Identifier:
1339406
Report Number(s):
BNL-113593-2017-JA
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:
AC05-00OR22725; SC00112704
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 15; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY