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Satellites and large doping and temperature dependence of electronic properties in hole-doped BaFe2As2

Werner, Philipp; Casula, Michele; Miyake, Takashi; Aryasetiawan, Ferdi LU ; Millis, Andrew J. and Biermann, Silke (2012) In Nature Physics 8(4). p.331-337
Abstract
Superconductivity has recently been discovered in several families of iron-based compounds, but despite intense research even such basic electronic properties of these materials as Fermi surfaces, effective electron masses and orbital characters are still subject to debate. Here, we address an issue that has not been considered before, namely the consequences of dynamical screening of the Coulomb interactions between Fe d electrons. We demonstrate that dynamical screening effects are important not only for higher-energy spectral features, such as correlation satellites seen in photoemission spectroscopy, but also for the low-energy electronic structure. Our analysis indicates that BaFe2As2 is a strongly correlated compound with strongly... (More)
Superconductivity has recently been discovered in several families of iron-based compounds, but despite intense research even such basic electronic properties of these materials as Fermi surfaces, effective electron masses and orbital characters are still subject to debate. Here, we address an issue that has not been considered before, namely the consequences of dynamical screening of the Coulomb interactions between Fe d electrons. We demonstrate that dynamical screening effects are important not only for higher-energy spectral features, such as correlation satellites seen in photoemission spectroscopy, but also for the low-energy electronic structure. Our analysis indicates that BaFe2As2 is a strongly correlated compound with strongly doping- and temperature-dependent properties. In the hole-overdoped regime an incoherent metal is found, whereas Fermi-liquid behaviour is recovered in the undoped compound. At optimal doping, the self-energy exhibits an unusual square-root energy dependence, which leads to strong band renormalizations near the Fermi level. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Physics
volume
8
issue
4
pages
331 - 337
publisher
Nature Publishing Group
external identifiers
  • wos:000302557600022
  • scopus:84859420436
ISSN
1745-2473
DOI
10.1038/NPHYS2250
language
English
LU publication?
yes
id
70556e76-f5c6-48e8-bd30-8174cba9c4e5 (old id 2574896)
date added to LUP
2012-06-04 12:52:10
date last changed
2017-10-01 03:26:43
@article{70556e76-f5c6-48e8-bd30-8174cba9c4e5,
  abstract     = {Superconductivity has recently been discovered in several families of iron-based compounds, but despite intense research even such basic electronic properties of these materials as Fermi surfaces, effective electron masses and orbital characters are still subject to debate. Here, we address an issue that has not been considered before, namely the consequences of dynamical screening of the Coulomb interactions between Fe d electrons. We demonstrate that dynamical screening effects are important not only for higher-energy spectral features, such as correlation satellites seen in photoemission spectroscopy, but also for the low-energy electronic structure. Our analysis indicates that BaFe2As2 is a strongly correlated compound with strongly doping- and temperature-dependent properties. In the hole-overdoped regime an incoherent metal is found, whereas Fermi-liquid behaviour is recovered in the undoped compound. At optimal doping, the self-energy exhibits an unusual square-root energy dependence, which leads to strong band renormalizations near the Fermi level.},
  author       = {Werner, Philipp and Casula, Michele and Miyake, Takashi and Aryasetiawan, Ferdi and Millis, Andrew J. and Biermann, Silke},
  issn         = {1745-2473},
  language     = {eng},
  number       = {4},
  pages        = {331--337},
  publisher    = {Nature Publishing Group},
  series       = {Nature Physics},
  title        = {Satellites and large doping and temperature dependence of electronic properties in hole-doped BaFe2As2},
  url          = {http://dx.doi.org/10.1038/NPHYS2250},
  volume       = {8},
  year         = {2012},
}