dorsal/arxiv
View SchemaComparison of localization procedures for applications in crystal embedding
| Authors | Oleh Danyliv, Lev Kantorovich |
|---|---|
| Categories | |
| ArXiv ID | physics/0401108 |
| URL | https://arxiv.org/abs/physics/0401108 |
| DOI | 10.1103/PhysRevB.70.075113 |
Abstract
With the aim of future applications in quantum mechanical embedding in extended systems such as crystals, we suggest a simple and computationally efficient method which enables construction of a set of nonorthogonal highly localized one-electron orbitals for periodic nonmetallic crystals which reflect their chemical nature. The orbitals are also used to build up the Hartree-Fock (HF) electron density of the entire crystals. The simplicity of the method stems from the fact that it does not require usage and/or modification of periodic electronic structure codes, and is instead based on the HF calculation of a sequence of finite clusters with subsequent application of a localization procedure to transform the HF canonical molecular orbitals. Two extreme cases of chemical bonding, ionic (MgO crystal) and covalent (Si crystal), are considered for which a number of known localization schemes are applied and compared. With some modifications our method can also be applied to nonperiodic nonmetallic systems as well.
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"abstract": "With the aim of future applications in quantum mechanical embedding in\nextended systems such as crystals, we suggest a simple and computationally\nefficient method which enables construction of a set of nonorthogonal highly\nlocalized one-electron orbitals for periodic nonmetallic crystals which reflect\ntheir chemical nature. The orbitals are also used to build up the Hartree-Fock\n(HF) electron density of the entire crystals. The simplicity of the method\nstems from the fact that it does not require usage and/or modification of\nperiodic electronic structure codes, and is instead based on the HF calculation\nof a sequence of finite clusters with subsequent application of a localization\nprocedure to transform the HF canonical molecular orbitals. Two extreme cases\nof chemical bonding, ionic (MgO crystal) and covalent (Si crystal), are\nconsidered for which a number of known localization schemes are applied and\ncompared. With some modifications our method can also be applied to nonperiodic\nnonmetallic systems as well.",
"arxiv_id": "physics/0401108",
"authors": [
"Oleh Danyliv",
"Lev Kantorovich"
],
"categories": [
"physics.comp-ph",
"cond-mat.mtrl-sci",
"physics.atm-clus"
],
"doi": "10.1103/PhysRevB.70.075113",
"title": "Comparison of localization procedures for applications in crystal embedding",
"url": "https://arxiv.org/abs/physics/0401108"
},
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