An Orbital-dependent Correlation Energy Functional in Density-functional Theory for the Study of Strongly-correlated Electronic Systems
-
- Yasuhara Hiroshi
- Institute for Materials Research, Tohoku University
-
- Higuchi Masahiko
- Department of Physics, Faculty of Science, Shinshu University
-
- Ishii Soh
- Institute for Materials Research, Tohoku University
-
- Hongo Kenta
- Institute for Materials Research, Tohoku University
-
- Kawazoe Yoshiyuki
- Institute for Materials Research, Tohoku University
書誌事項
- タイトル別名
-
- Orbital dependent Correlation Energy Functional in Density functional Theory for the Study of Strongly correlated Electronic Systems
この論文をさがす
抄録
An orbital-dependent correlation energy functional Ec to be accompanied by the exact exchange energy functional Ex is proposed for applications of density-functional theory (DFT). The present Ec comprises spin-antiparallel and spin-parallel contributions, Ecσ−σ and Ecσσ. Ecσ−σ is a modification of the spin-antiparallel component of the Hartree energy functional with a factor of gσ−σ (r, r′)−1 and Ecσσ a modification of the spin-parallel component of the same energy functional with gcσσ(r, r′) where gσ−σ(r, r′) (or gcσσ(r, r′)) is the spin-antiparallel (or the correlational part of the spin-parallel) coupling-constant-averaged pair correlation function. The present orbital-dependent gσ−σ(r, r′) and gcσσ(r, r′) fulfill the symmetric property, the Pauli principle and the sum rules. In the limit of uniform density the two correlation functions are reduced to the very accurate analogues of the electron liquid that involve long-, intermediate-, and short-range correlations as well as their exchange counterparts. It is stressed that the correlation energy functional Ec in DFT should by its very nature be defined as a functional only of occupied Kohn-Sham orbitals and occupied Kohn-Sham energies for the purpose of employing the optimized potential method (OPM) to evaluate the correlation potential υc(r). The present scheme for Ec, if applied to finite systems after making a suitable change in the treatment of long-range correlation, can give the correct asymptotic form of υc(r) of order r−4 for large r as well as the van der Waals potential.
収録刊行物
-
- MATERIALS TRANSACTIONS
-
MATERIALS TRANSACTIONS 45 (5), 1402-1410, 2004
公益社団法人 日本金属学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390282679226559872
-
- NII論文ID
- 10013070670
-
- NII書誌ID
- AA1151294X
-
- COI
- 1:CAS:528:DC%2BD2cXkvFyjtr4%3D
-
- ISSN
- 13475320
- 13459678
-
- HANDLE
- 10097/52122
-
- NDL書誌ID
- 6950920
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可