ISSN:
1573-7357
Keywords:
74.25 Jb
;
74.72 Jt
;
79.60 Bm
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We report polarization-dependent angle-resolved photoemission studies of single crystalline Ba2Cu3O4Cl2. This antiferromagnet adopts a layered body-centered tetragonal structure related to that of the cuprates, but with anextra copper site resulting in a plane with Cu3O4 stoichiometry. For the Γ-M direction of the Brillouin zone we observe a dispersive feature with a bandwidth of 400 ±80 meV, which approaches to within ∼ 0.9 eV of the Fermi level at (π/2,π/2). The magnitude of the observed dispersion and its polarization dependence are consistent with its origin as a purely antibonding combination of O2px,y and $$Cu3d_{x^2 - y^2 }$$ atomic orbitals from the cuprate-like CuO2 sub-system, i.e. Zhang-Rice singlets.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00768409
Permalink
