Results 21 to 30 of about 142 (53)

Metallic bonding due to correlations: A quantum chemical ab-initio calculation of the cohesive energy of mercury

open access: yes, 2004
Solid mercury in the rhombohedral structure is unbound within the self-consistent field (Hartree-Fock) approximation. The metallic binding is entirely due to electronic correlations.
Andrae   +21 more
core   +1 more source

Properties of nitrogen-vacancy centers in diamond: group theoretic approach [PDF]

open access: yes, 2010
We present a procedure that makes use of group theory to analyze and predict the main properties of the negatively charged nitrogen-vacancy (NV) center in diamond.
A Gali   +23 more
core   +2 more sources

The Stability of Polar Oxide Surfaces [PDF]

open access: yes, 2001
The structures of the polar surfaces of ZnO are studied using ab initio calculations and surface x-ray diffraction. The experimental and theoretical relaxations are in good agreement.
Harrison, NM   +7 more
core  

Multireference configuration interaction treatment of excited-state electron correlation in periodic systems: the band structure of trans-polyacetylene

open access: yes, 2004
A systematic method to account for electron correlation in periodic systems which can predict quantitatively correct band structures of non-conducting solids from first principles is presented.
Albrecht   +27 more
core   +1 more source

Oxygen-stripes in La0.5Ca0.5MnO3 from ab initio calculations

open access: yes, 2003
We investigate the electronic, magnetic and orbital properties of La0.5Ca0.5MnO3 perovskite by means of an ab initio electronic structure calculation within the Hartree-Fock approximation.
F. C. Zhang   +5 more
core   +1 more source

Elastic properties of mono- and polycrystalline hexagonal AlB2-like diborides of s, p and d metals from first-principles calculations [PDF]

open access: yes, 2008
We have performed accurate ab initio total energy calculations using the full-potential linearized augmented plane wave (FP-LAPW) method with the generalized gradient approximation (GGA) for the exchange-correlation potential to systematically ...
Alexander L Ivanovskii   +37 more
core   +1 more source

The convergence of the ab-initio many-body expansion for the cohesive energy of solid mercury

open access: yes, 2004
A many-body expansion for mercury clusters of the form E = \sum_ ...
Beate Paulus   +9 more
core   +1 more source

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