Volume 99, Number 6, September 2012
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||14 September 2012|
Dynamical screening in strongly correlated metal SrVO3
1 Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences - Beijing 100190, China
2 Institute of Physics, Chinese Academy of Sciences - Beijing 100190, China
3 Science and Technology on Surface Physics and Chemistry Laboratory - P.O. Box 718-35, Mianyang 621907, China
Received: 1 June 2012
Accepted: 16 August 2012
The consequences of dynamical screening of Coulomb interaction among correlated electrons in realistic materials have not been widely considered before. In this letter we try to incorporate a frequency-dependent Coulomb interaction into the state-of-the-art ab initio electronic structure computing framework of local density approximation plus dynamical mean-field theory, and then choose SrVO3 as a prototype material to demonstrate the importance of dynamical screening effect. It is shown to renormalise the spectral weight near the Fermi level, to increase the effective mass, and to suppress the t2g quasiparticle bandwidth apparently. The calculated results are in accordance with very recent angle-resolved photoemission spectroscopy experiments and Bose factor ansatz calculations.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 71.10.-w – Theories and models of many-electron systems / 71.15.-m – Methods of electronic structure calculations
© EPLA, 2012
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