Home
For authors
Submission status

Archive
Archive (English)
Current
      Volume 114
      Volume 113
      Volume 112
      Volume 111
      Volume 110
      Volume 109
      Volume 108
      Volume 107
      Volume 106
      Volume 105
      Volume 104
      Volume 103
      Volume 102
      Volume 101
      Volume 100
      Volume 99
      Volume 98
      Volume 97
      Volume 96
      Volume 95
      Volume 94
      Volume 93
Search
VOLUME 97 | ISSUE 1 | PAGE 18
LDA^\prime+DMFT investigation of electronic structure of K1-xFe2-ySe2 superconductor
Abstract
We investigate electronic structure of the new iron chalcogenide high temperature superconductor K1-xFe2-ySe2 (hole doped case with x=0.24, y=0.28) in the normal phase using the novel LDA^\prime+DMFT computational approach. We show that this iron chalcogenide is more correlated in a sense of bandwidth renormalization (energy scale compression by factor about 5 in the interval \pm1.5 eV), than typical iron pnictides (compression factor about 2), though the Coulomb interaction strength is almost the same in both families. Our results for spectral densities are in general agreement with recent ARPES data on this system. It is found that all Fe-3d(t2g) bands crossing the Fermi level have equal renormalization, in contrast to some previous interpretations. Electronic states at the Fermi level are of predominantly xy symmetry. Also we show that LDA^\prime+DMFT results are in better agreement with experimental spectral function maps, than the results of conventional LDA+DMFT. Finally we make predictions for photoemission spectra lineshape for K0.76Fe1.72Se2 .