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Stashans A, Erazo F, Ortiz J, Valverde P. Oxygen-vacancy defects on the SrTiO3(001) surface: a quantum-chemical study. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13642810110069585] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- A. Stashans
- a Centro de Investigación en Física de la Materia Condensada , Corporación de Física Fundamental y Aplicada , Apartado 17-12-637, Quito , Ecuador
| | - F. Erazo
- a Centro de Investigación en Física de la Materia Condensada , Corporación de Física Fundamental y Aplicada , Apartado 17-12-637, Quito , Ecuador
| | - J. Ortiz
- a Centro de Investigación en Física de la Materia Condensada , Corporación de Física Fundamental y Aplicada , Apartado 17-12-637, Quito , Ecuador
| | - P. Valverde
- a Centro de Investigación en Física de la Materia Condensada , Corporación de Física Fundamental y Aplicada , Apartado 17-12-637, Quito , Ecuador
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Affiliation(s)
- F. Erazo
- a Centro de Investigación en Física de la Materia Condensada , Corporación de Física Fundamental y Aplicada , Apartado 17-12-637, Quito , Ecuador
| | - A. Stashans
- a Centro de Investigación en Física de la Materia Condensada , Corporación de Física Fundamental y Aplicada , Apartado 17-12-637, Quito , Ecuador
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Stashans A, Chamba G, Pinto H. Electronic structure, chemical bonding, and geometry of pure and Sr-doped CaCO3. J Comput Chem 2007; 29:343-9. [PMID: 17654648 DOI: 10.1002/jcc.20777] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The electronic structure, chemical bonding, geometry, and effects produced by Sr-doping in CaCO(3) have been studied on the basis of density-functional theory using the VASP simulation package and molecular-orbital theory utilizing the CLUSTERD computer code. Two calcium carbonate structures which occur naturally in anhydrous crystalline forms, calcite and aragonite, were considered in the present investigation. The obtained diagrams of density of states show similar patterns for both materials. The spatial structures are computed and analyzed in comparison to the available experimental data. The electronic properties and atomic displacements because of the trace element Sr-incorporation are discussed in a comparative manner for the two crystalline structures.
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Affiliation(s)
- Arvids Stashans
- Grupo de Física de Cristales, Escuela de Electrónica y Telecomunicaciones, Universidad Técnica Particular de Loja, Apartado 11-01-608, Loja, Ecuador.
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Sushko PV, Gavartin JL, Shluger AL. Electronic Properties of Structural Defects at the MgO (001) Surface. J Phys Chem B 2002. [DOI: 10.1021/jp0129481] [Citation(s) in RCA: 130] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter V. Sushko
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
| | - Jacob L. Gavartin
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
| | - Alexander L. Shluger
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
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Lunell S, Stashans A, Ojamäe L, Lindström H, Hagfeldt A. Li and Na Diffusion in TiO2 from Quantum Chemical Theory versus Electrochemical Experiment. J Am Chem Soc 1997. [DOI: 10.1021/ja9708629] [Citation(s) in RCA: 192] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sten Lunell
- Contribution from the Department of Quantum Chemistry, Uppsala University, Box 518, S-751 20 Uppsala, Sweden, Department of Physical, Inorganic and Structural Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, and Department of Physical Chemistry, Uppsala University, Box 532, S-751 21 Uppsala, Sweden
| | - Arvids Stashans
- Contribution from the Department of Quantum Chemistry, Uppsala University, Box 518, S-751 20 Uppsala, Sweden, Department of Physical, Inorganic and Structural Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, and Department of Physical Chemistry, Uppsala University, Box 532, S-751 21 Uppsala, Sweden
| | - Lars Ojamäe
- Contribution from the Department of Quantum Chemistry, Uppsala University, Box 518, S-751 20 Uppsala, Sweden, Department of Physical, Inorganic and Structural Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, and Department of Physical Chemistry, Uppsala University, Box 532, S-751 21 Uppsala, Sweden
| | - Henrik Lindström
- Contribution from the Department of Quantum Chemistry, Uppsala University, Box 518, S-751 20 Uppsala, Sweden, Department of Physical, Inorganic and Structural Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, and Department of Physical Chemistry, Uppsala University, Box 532, S-751 21 Uppsala, Sweden
| | - Anders Hagfeldt
- Contribution from the Department of Quantum Chemistry, Uppsala University, Box 518, S-751 20 Uppsala, Sweden, Department of Physical, Inorganic and Structural Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, and Department of Physical Chemistry, Uppsala University, Box 532, S-751 21 Uppsala, Sweden
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Stashans A, Lunell S, Bergström R, Hagfeldt A, Lindquist SE. Theoretical study of lithium intercalation in rutile and anatase. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:159-170. [PMID: 9981959 DOI: 10.1103/physrevb.53.159] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Shluger AL, Rohl AL, Gay DH. Properties of small clusters at ionic surfaces: (NaCl)n clusters (n=1-48) at the (100) MgO surface. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:13631-13644. [PMID: 9978166 DOI: 10.1103/physrevb.51.13631] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Stashans A, Kotomin E, Calais J. Calculations of the ground and excited states of F-type centers in corundum crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:14854-14858. [PMID: 10010586 DOI: 10.1103/physrevb.49.14854] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Stefanovich EV, Shluger AL, Catlow CR. Theoretical study of the stabilization of cubic-phase ZrO2 by impurities. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:11560-11571. [PMID: 10010022 DOI: 10.1103/physrevb.49.11560] [Citation(s) in RCA: 94] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Puchin V, Shluger A, Nakai Y, Itoh N. Theoretical study of Na-atom emission from NaCl (100) surfaces. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:11364-11373. [PMID: 10009989 DOI: 10.1103/physrevb.49.11364] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Shluger AL, Wilson RM, Williams RT. Theoretical and experimental investigation of force imaging at the atomic scale on alkali halide crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:4915-4930. [PMID: 10011425 DOI: 10.1103/physrevb.49.4915] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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