Zobrazeno 1 - 10
of 305
pro vyhledávání: '"Aryasetiawan, F"'
Autor:
Aryasetiawan, F., Karlsson, K.
The quasiparticle wavefunction of a many-electron system is traditionally defined as the eigenfunction of the quasiparticle eigenvalue equation involving the self-energy. In this article a new concept of a quasiparticle wavefunction is derived from t
Externí odkaz:
http://arxiv.org/abs/2412.03418
Autor:
Aryasetiawan, F.
Starting from the recently proposed dynamical exchange-correlation field framework, the equation of motion of the diagonal part of the many-electron Green function is derived, from which the spectral function can be obtained. The resulting equation o
Externí odkaz:
http://arxiv.org/abs/2303.00686
Autor:
Karlsson, K., Aryasetiawan, F.
The exchange-correlation hole and potential of the homogeneous electron gas have been investigated within the random-phase approximation, employing the plasmon-pole approximation for the linear density response function. The angular dependence as wel
Externí odkaz:
http://arxiv.org/abs/2301.05590
Autor:
Aryasetiawan, F., Sjöstrand, T.
The spectral functions of the one-band half-filled 1D Hubbard chain are calculated using the exchange-correlation potential formalism developed recently. The exchange-correlation potential is adopted from the exact potential derived from the Hubbard
Externí odkaz:
http://arxiv.org/abs/2204.09980
Publikováno v:
Phys. Rev. B 93, 161104 (2016)
A general formula for the orbital magnetic moment of interacting electrons in solids is derived using the many-electron Green function method. The formula factorizes into two parts, a part that contains the information about the one-particle band str
Externí odkaz:
http://arxiv.org/abs/1512.06653
Publikováno v:
Phys. Rev. B 88, 235110 (2013)
We present a detailed calculation of the electronic structure of SrVO$_{3}$ based on the GW+DMFT method. We show that a proper inclusion of the frequency-dependent Hubbard U and the nonlocal self-energy via the GW approximation, as well as a careful
Externí odkaz:
http://arxiv.org/abs/1307.6361
Autor:
Aryasetiawan, F., Karlsson, K.
Publikováno v:
In Journal of Physics and Chemistry of Solids May 2019 128:87-108
Publikováno v:
Phys. Rev. B 87, 115110 (2013)
It is known from self-energy calculations in the electron gas and sp materials based on the GW approximation that a typical quasiparticle renormalization factor (Z factor) is approximately 0.7-0.8. Band narrowing in electron gas at rs = 4 due to corr
Externí odkaz:
http://arxiv.org/abs/1210.0409
Publikováno v:
Phys. Rev. Lett. 109, 126408 (2012)
We provide a prescription for constructing Hamiltonians representing the low energy physics of correlated electron materials with dynamically screened Coulomb interactions. The key feature is a renormalization of the hopping and hybridization paramet
Externí odkaz:
http://arxiv.org/abs/1204.4900
The \emph{GW} approximation takes into account electrostatic self-interaction contained in the Hartree potential through the exchange potential. However, it has been known for a long time that the approximation contains self-screening error as eviden
Externí odkaz:
http://arxiv.org/abs/1110.6765