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Bučko T, Novotný M, Černušák I. On the work function of the surface Mo(0 0 1) and its temperature dependence: an ab initio molecular dynamics study. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:505001. [PMID: 30460924 DOI: 10.1088/1361-648x/aaeb76] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Ab initio molecular dynamics simulations in NVT ensemble have been performed to investigate the finite temperature structure of the Mo(0 0 1) surface and its effect on work function (ϕ). In accord with previous experimental and theoretical work, our simulations predict that a termination with a stable reconstruction pattern is formed at T = 123 K. This pattern vanishes when temperature is increased to 423 K or 623 K and a disordered surface phase is formed whose time average corresponds to a bulk-like termination. Our results demonstrate that the surface relaxation is an important factor contributing to thermal variation of ϕ. At the lowest temperature, at which a stable reconstruction pattern is formed, the work function is found to increase by ∼0.23 eV compared to relaxed unreconstructed surface. The disappearance of stable reconstruction pattern at elevated temperatures leads to a decrease of ϕ by ∼0.07 eV. In contrast, the values computed for a non-reconstructing surface Mo(1 1 0) at T = 123 K, 423 K and 623 K are found to be nearly identical to the zero temperature value, which is a consequence of restricted atomic motion due to high packing density in this surface.
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Affiliation(s)
- Tomáš Bučko
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, SK-84215 Bratislava, Slovakia. Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84236 Bratislava, Slovakia
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Stacey TE, Fredrickson DC. The μ3 Model of Acids and Bases: Extending the Lewis Theory to Intermetallics. Inorg Chem 2012; 51:4250-64. [DOI: 10.1021/ic202727k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Timothy E. Stacey
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison,
Wisconsin 53706, United States
| | - Daniel C. Fredrickson
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison,
Wisconsin 53706, United States
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Stacey TE, Fredrickson DC. Perceiving molecular themes in the structures and bonding of intermetallic phases: the role of Hückel theory in an ab initio era. Dalton Trans 2012; 41:7801-13. [DOI: 10.1039/c2dt30298e] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Foiles SM. Interatomic Interactions for BCC Metals Based on the Low Order Moments of the Density of States. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-278-339] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractA model of the energetics of bcc transition metals based on the low-order moments of the electronic density of states is presented. The new feature of the model is an additional energy term related to the fourth moment of the density of states. This term reflects the coarse shape of the density of states. The model is tested by the computation of point defect properties, phonon dispersions, structural energy differences and surface properties. The results are compared to experiment, ab-initio calculations and other model interatomic potentials. The results indicate that the inclusion of the fourth moment term in the energy does not significantly improve the description of properties of the bulk bcc metals. However, the fourth moment term substantially improves the description of large deviations from the bcc bulk such as surfaces and alternative crystal structures.
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Elsässer C, Beck O, Ochs T, Meyer B. Ab-Initio Determination of the Atomic Structure of Symmetrical Tilt Grain Boundaries in BCC Transition Metals. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-492-121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTAtomistic simulations of grain-boundary structures in body-centered cubic transition metals have revealed that angle-dependent contributions to interatomic interactions are essential. Unfortunately, the results of presently available empirical many-body potentials are not yet always sufficiently reliable for quantitative theoretical predictions of grain-boundary structures, which are consistent with experimental observations, e.g. by high-resolution transmission electron microscopy.Ab-initio electronic-structure calculations based on the local-density-functional theory offer the possibility to determine accurately the microscopic structures of special, high-symmetry grain boundaries, which can be used as data bases for the improvement of empirical many-body potentials. Such ab-initio calculations, with a mixed-basis pseudopotential method and grain-boundary supercells, are presented for Σ5 (310) [001] 36.87° symmetrical tilt grain boundaries in Niobium and Molybdenum.
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Ochs T, Elsässer C, Mrovec M, Vitek V, Belak J, Moriarty JA. Symmetrical tilt grain boundaries in bcc transition metals: Comparison of semiempirical with ab-initio total-energy calculations. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/01418610008216481] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- T. Ochs
- a Max-Planck-Institut für Metallforschung , Seestraße 92, D-70174 , Stuttgart , Germany
| | - C. Elsässer
- a Max-Planck-Institut für Metallforschung , Seestraße 92, D-70174 , Stuttgart , Germany
| | - M. Mrovec
- b Department of Materials Science and Engineering , University of Pennsylvania , Philadelphia , Pennsylvania , 19104-6272 , USA
| | - V. Vitek
- b Department of Materials Science and Engineering , University of Pennsylvania , Philadelphia , Pennsylvania , 19104-6272 , USA
| | - J. Belak
- c Lawrence Livermore National Laboratory, Physics Directorate , POB 808, Livermore , California , 94550 , USA
| | - J. A. Moriarty
- c Lawrence Livermore National Laboratory, Physics Directorate , POB 808, Livermore , California , 94550 , USA
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Brenner DW, Shenderova OA, Areshkin DA. Quantum-Based Analytic Interatomic Forces and Materials Simulation. REVIEWS IN COMPUTATIONAL CHEMISTRY 2007. [DOI: 10.1002/9780470125892.ch4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Bacia M, Morillo J, Pénisson JM, Pontikis V. Atomic structure of the ∑ = 5, (210) and (310), [001] tilt axis grain boundaries in Mo: a joint study by computer simulation and high-resolution electron microscopy. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01418619708200009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. Bacia
- a Département de Recherche Fondamentale sur la Matière Condensée , CEA-Grenoble , 17 rue des Martyrs, F-38054 , Grenoble , Cedex 9 , France
| | - J. Morillo
- b Laboratoire des Solides Irradiés , Unité de Recherche associée au CEA-CNRS URA 1380, Ecole Polytechnique , F-91128 , Palaiseau , Cedex , France
| | - J. M. Pénisson
- a Département de Recherche Fondamentale sur la Matière Condensée , CEA-Grenoble , 17 rue des Martyrs, F-38054 , Grenoble , Cedex 9 , France
| | - V. Pontikis
- b Laboratoire des Solides Irradiés , Unité de Recherche associée au CEA-CNRS URA 1380, Ecole Polytechnique , F-91128 , Palaiseau , Cedex , France
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Dudarev SL. Angular-dependent matrix potentials for fast molecular-dynamics simulations of transition metals. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2006; 18:S447-S461. [PMID: 21690746 DOI: 10.1088/0953-8984/18/16/s06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The significance of the part played by the angular-dependent components of forces associated with d-d bonding between atoms in a transition metal has long remained a subject of debate. While almost all the large-scale molecular dynamics simulations of collision cascades and radiation damage in transition metals and alloys are currently performed using spherically symmetric many-body potentials, density functional calculations exhibit a highly anisotropic pattern of charge density deformation in and around the core of interstitial atom defects. This paper describes a fast second-order matrix recursion-based algorithm for including effects of angular anisotropy of d-d bonds in a large-scale molecular dynamics simulation.
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Affiliation(s)
- S L Dudarev
- EURATOM/UKAEA Fusion Association, Culham Science Centre, Oxfordshire OX14 3DB, UK
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Mrovec M, Ochs T, Elsässer C, Vitek V, Nguyen-Manh D, Pettifor DG. Never Ending Saga of a Simple Boundary. ACTA ACUST UNITED AC 2003. [DOI: 10.3139/146.030244] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Yang LH, Söderlind P, Moriarty JA. Accurate atomistic simulation of (a/2) 〈111〉 screw dislocations and other defects in bcc tantalum. ACTA ACUST UNITED AC 2001. [DOI: 10.1080/01418610108214446] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Vystavél T, Pénisson JM, Gemperle A. High-resolution and conventional electron microscopy study of a Σ = 3, [101]{121} twin grain boundary in molybdenum. ACTA ACUST UNITED AC 2001. [DOI: 10.1080/01418610108214312] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Girshick A, Bratkovsky AM, Pettifor DG, Vitek V. Atomistic simulation of titanium. I. A bond-order potential. ACTA ACUST UNITED AC 1998. [DOI: 10.1080/01418619808221223] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Xu W, Moriarty JA. Atomistic simulation of ideal shear strength, point defects, and screw dislocations in bcc transition metals: Mo as a prototype. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:6941-6951. [PMID: 9984313 DOI: 10.1103/physrevb.54.6941] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Mehl MJ, Papaconstantopoulos DA. Applications of a tight-binding total-energy method for transition and noble metals: Elastic constants, vacancies, and surfaces of monatomic metals. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:4519-4530. [PMID: 9986411 DOI: 10.1103/physrevb.54.4519] [Citation(s) in RCA: 516] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Xu W, Adams JB, Einstein TL. Oscillatory interaction of steps on W{110}. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:2910-2916. [PMID: 9986148 DOI: 10.1103/physrevb.54.2910] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Voter AF, Kress JD, Silver RN. Linear-scaling tight binding from a truncated-moment approach. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:12733-12741. [PMID: 9982944 DOI: 10.1103/physrevb.53.12733] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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20
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Einstein T. Interactions Between Adsorbate Particles. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/s1573-4331(96)80016-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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Marinopoulos AG, Vitek V, Carlsson AE. Significance of non-central forces in atomistic studies of grain boundaries in bcc transition metals. ACTA ACUST UNITED AC 1995. [DOI: 10.1080/01418619508236257] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Guevara J, Llois AM, Weissmann M. Model potential based on tight-binding total-energy calculations for transition-metal systems. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:11509-11516. [PMID: 9980260 DOI: 10.1103/physrevb.52.11509] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kress JD, Voter AF. Low-order moment expansions to tight binding for interatomic potentials: Successes and failures. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:8766-8775. [PMID: 9979866 DOI: 10.1103/physrevb.52.8766] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Nastar M, Willaime F. Tight-binding calculation of the elastic constants of fcc and hcp transition metals. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:6896-6907. [PMID: 9977243 DOI: 10.1103/physrevb.51.6896] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Cohen RE, Mehl MJ, Papaconstantopoulos DA. Tight-binding total-energy method for transition and noble metals. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:14694-14697. [PMID: 9975712 DOI: 10.1103/physrevb.50.14694] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Simonelli G, Pasianot R, Savino EJ. Point-defect computer simulation including angular forces in bcc iron. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:727-738. [PMID: 9975737 DOI: 10.1103/physrevb.50.727] [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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Feibelman PJ, Nelson JS, Kellogg GL. Energetics of Pt adsorption on Pt(111). PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:10548-10556. [PMID: 10009880 DOI: 10.1103/physrevb.49.10548] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Holzwarth NA, Chervenak JA, Kimmer CJ, Zeng Y, Xu W, Adams J. Multilayer-relaxation geometry and electronic structure of a W(111) surface. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:12136-12145. [PMID: 10007564 DOI: 10.1103/physrevb.48.12136] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Canel LM, Carlsson AE, Fedders PA. Effect of overlap on semiempirical potentials derived from tight binding. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:10739-10750. [PMID: 10007372 DOI: 10.1103/physrevb.48.10739] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Roelofs LD, Foiles SM. Mo(001) seventh-order reconstruction: Ground-state structure and reconstruction mechanism. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:11287-11290. [PMID: 10007439 DOI: 10.1103/physrevb.48.11287] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Foiles SM. Interatomic interactions for Mo and W based on the low-order moments of the density of states. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:4287-4298. [PMID: 10008899 DOI: 10.1103/physrevb.48.4287] [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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32
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Daw MS. Model for energetics of solids based on the density matrix. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:10895-10898. [PMID: 10005211 DOI: 10.1103/physrevb.47.10895] [Citation(s) in RCA: 150] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Campbell GH, Foiles SM, Gumbsch P, Rühle M, King WE. Atomic structure of the (310) twin in niobium: Experimental determination and comparison with theoretical predictions. PHYSICAL REVIEW LETTERS 1993; 70:449-452. [PMID: 10054115 DOI: 10.1103/physrevlett.70.449] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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