Dynamical screening in ${\text{La}}_{2}{\text{CuO}}_{4}$
- Werner, Philipp Department of Physics, University of Fribourg, Switzerland
- Sakuma, Rei Department of Physics, Division of Mathematical Physics, Lund University, Sweden
- Nilsson, Fredrik Department of Physics, Division of Mathematical Physics, Lund University, Sweden
- Aryasetiawan, Ferdi Department of Physics, Division of Mathematical Physics, Lund University, Sweden
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26.03.2015
Published in:
- Physical Review B. - 2015, vol. 91, no. 12, p. 125142
English
We show that the dynamical screening of the Coulomb interaction among Cu-d electrons in high-Tc cuprates is strong and that a proper treatment of this effect is essential for a consistent description of the electronic structure. In particular, we find that ab initio calculations for undoped La2CuO4 in the paramagnetic phase yield an insulator only if the frequency dependence of the Coulomb interaction and the interatomic interaction between p and d electrons are taken into account. We also identify a collective excitation in the screened interaction at 9 eV, which is rather localized on the copper site, and which is responsible for a satellite structure at energy −13 eV, located below the p bands.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 255969
- DOI 10.1103/PhysRevB.91.125142
- Persistent URL
- https://folia.unifr.ch/unifr/documents/304351
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