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Maitra NT. Perspective: Fundamental aspects of time-dependent density functional theory. J Chem Phys 2016; 144:220901. [DOI: 10.1063/1.4953039] [Citation(s) in RCA: 228] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Neepa T. Maitra
- Department of Physics and Astronomy, Hunter College and the Physics Program at the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10065, USA
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Correa AA, Kohanoff J, Artacho E, Sánchez-Portal D, Caro A. Nonadiabatic forces in ion-solid interactions: the initial stages of radiation damage. PHYSICAL REVIEW LETTERS 2012; 108:213201. [PMID: 23003250 DOI: 10.1103/physrevlett.108.213201] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Indexed: 06/01/2023]
Abstract
The Born-Oppenheimer approximation is the keystone for molecular dynamics simulations of radiation damage processes; however, actual materials response involves nonadiabatic energy exchange between nuclei and electrons. In this work, time dependent density functional theory is used to calculate the electronic excitations produced by energetic protons in Al. We study the influence of these electronic excitations on the interatomic forces and find that they differ substantially from the adiabatic case, revealing a nontrivial connection between electronic and nuclear stopping that is absent in the adiabatic case. These results unveil new effects in the early stages of radiation damage cascades.
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Affiliation(s)
- Alfredo A Correa
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
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Abstract
Sodium, which has long been regarded as one of the simplest metals, displays a great deal of structural, optical, and electronic complexities under compression. We compressed pure Na in the body-centered cubic structure to 52 GPa and in the face-centered cubic structure from 64 to 97 GPa, and studied the plasmon excitations of both structures using the momentum-dependent inelastic X-ray scattering technique. The plasmon dispersion curves as a function of pressure were extrapolated to zero momentum with a quadratic approximation. As predicted by the simple free-electron model, the square of the zero-momentum plasmon energy increases linearly with densification of the body-centered cubic Na up to 1.5-fold. At further compressions and in face-centered cubic Na above 64 GPa, the linear relation curves progressively toward the density axis up to 3.7-fold densification at 97 GPa. Ab initio calculations indicate that the deviation is an expected behavior of Na remaining a simple metal.
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EGUILUZ ADOLFOG, SCHONE WOLFDIETER. Electronic excitations and correlation effects in metals. Mol Phys 2010. [DOI: 10.1080/002689798168376] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Sakko A, Rubio A, Hakala M, Hämäläinen K. Time-dependent density functional approach for the calculation of inelastic x-ray scattering spectra of molecules. J Chem Phys 2010; 133:174111. [DOI: 10.1063/1.3503594] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Alkauskas A, Schneider S, Sagmeister S, Ambrosch-Draxl C, Hébert C. Theoretical analysis of the momentum-dependent loss function of bulk Ag. Ultramicroscopy 2010. [DOI: 10.1016/j.ultramic.2009.12.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Marušić L, Despoja V, Sunjić M. Surface plasmon and electron-hole structures in the excitation spectra of thin films. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2006; 18:4253-4263. [PMID: 21690779 DOI: 10.1088/0953-8984/18/17/013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Surface excitation spectra are calculated, including both collective and single-particle modes, and examined in detail. This is achieved by calculating the non-local dielectric function ε(p)(Q,z,z('),ω) of the thin jellium film within the random phase approximation (RPA) (using local density approximation wavefunctions which actually takes us beyond the RPA), from which we then derive the spectral function. The high precision of the calculations enables us to analyse not only the collective (surface plasmon) modes and their dependence on the film thickness, but also the intra-band electron-hole excitations, and for the first time oscillatory structures due to inter-band transitions. The spectra are then analysed with special attention to their dependence on the slab thickness, and the periodic peaks observed due to single-particle excitations in the spectra.
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Silkin VM, Chulkov EV, Echenique PM. Band structure versus dynamical exchange-correlation effects in surface plasmon energy and damping: a first-principles calculation. PHYSICAL REVIEW LETTERS 2004; 93:176801. [PMID: 15525102 DOI: 10.1103/physrevlett.93.176801] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2004] [Indexed: 05/24/2023]
Abstract
A first-principles parameter-free calculation that includes full three-dimensional band structure and dynamical exchange correlations is reported for the dynamical surface response and surface plasmon (SP) on a simple metal prototype surface Mg(0001). We demonstrate that band structure effects have a more profound impact on the SP characteristics than dynamical exchange correlations. A comparison with jellium and one-dimensional potential evaluations shows that the band structure is of paramount importance for the correct description of the SP linewidth and also leads to a better description of the SP energy dispersion. The inclusion of the exchange-correlation kernel results in a better agreement with experimental data. We show that lateral crystal local field effects have a negligible impact on the SP properties. Significant anisotropy is predicted for the SP linewidth.
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Affiliation(s)
- V M Silkin
- Donostia International Physics Center (DIPC), P. de Manuel Lardizabal 4, 20018 San Sebastián, Basque Country, Spain
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Ku W, Pickett WE, Scalettar RT, Eguiluz AG. Ab initio investigation of collective charge excitations in MgB2. PHYSICAL REVIEW LETTERS 2002; 88:057001. [PMID: 11863767 DOI: 10.1103/physrevlett.88.057001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2001] [Indexed: 05/23/2023]
Abstract
A sharp collective charge excitation is predicted in MgB2 at approximately 2.5 eV for q perpendicular to the boron layers, based on an all-electron analysis of the dynamical density response within time-dependent density functional theory. This novel excitation, consisting of coherent charge fluctuation between Mg and B sheets, induces an abrupt plasma edge in the experimentally observable reflectivity. The existence of this mode reflects the unique electronic structure of MgB2 that is also responsible for strong electron-phonon coupling. By contrast, the acoustic plasmon, recently suggested to explain the high T(c), is not realized when realistic transition strengths are incorporated.
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Affiliation(s)
- Wei Ku
- Physics Department, University of California, Davis, California 95616, USA
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Caliebe WA, Soininen JA, Shirley EL, Kao C, Hamalainen K. Dynamic structure factor of diamond and LiF measured using inelastic X-Ray scattering. PHYSICAL REVIEW LETTERS 2000; 84:3907-3910. [PMID: 11019236 DOI: 10.1103/physrevlett.84.3907] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/1999] [Indexed: 05/23/2023]
Abstract
The dynamic structure factors S(q-->,omega) of diamond and LiF have been measured using inelastic x-ray scattering. The experimental data are compared to results of ab initio calculations, which take into account the interaction of the excited electron with the remaining hole. In diamond, the vicinity of the indirect band gap and its momentum dependence are studied. In LiF, a larger energy range, which covers the fundamental exciton, the plasmon, and several interband transitions, is investigated. Calculations and measurements agree quite well and emphasize the need to properly include the interaction of the excited electron in the conduction band with the hole in the valence band.
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Affiliation(s)
- WA Caliebe
- Institut fur Festkorperforschung, Forschungszentrum Julich, 52425 Julich, Germany
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Hill JP, Kao C, Caliebe WA, Gibbs D, Hastings JB. Inelastic X-Ray Scattering Study of Solid and Liquid Li and Na. PHYSICAL REVIEW LETTERS 1996; 77:3665-3668. [PMID: 10062277 DOI: 10.1103/physrevlett.77.3665] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Lee KH, Chang KJ. Analytic continuation of the dynamic response function using an N-point Padé approximant. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:R8285-R8288. [PMID: 9984576 DOI: 10.1103/physrevb.54.r8285] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Larson BC, Tischler JZ, Isaacs ED, Zschack P, Fleszar A, Eguiluz AG. Inelastic X-Ray Scattering as a Probe of the Many-Body Local-Field Factor in Metals. PHYSICAL REVIEW LETTERS 1996; 77:1346-1349. [PMID: 10063053 DOI: 10.1103/physrevlett.77.1346] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ekardt W, Pacheco JM. Effective particle-hole interaction and the optical response of simple-metal clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:16864-16868. [PMID: 9981093 DOI: 10.1103/physrevb.52.16864] [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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Karlsson K, Aryasetiawan F. Plasmon lifetime, zone-boundary collective states, and energy-loss spectra of lithium. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:4823-4827. [PMID: 9981664 DOI: 10.1103/physrevb.52.4823] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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17
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Gonze X. Perturbation expansion of variational principles at arbitrary order. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1995; 52:1086-1095. [PMID: 9912348 DOI: 10.1103/physreva.52.1086] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Gonze X. Adiabatic density-functional perturbation theory. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1995; 52:1096-1114. [PMID: 9912349 DOI: 10.1103/physreva.52.1096] [Citation(s) in RCA: 121] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Onida G, Reining L, Godby RW, Andreoni W. Ab initio calculations of the quasiparticle and absorption spectra of clusters: The sodium tetramer. PHYSICAL REVIEW LETTERS 1995; 75:818-821. [PMID: 10060126 DOI: 10.1103/physrevlett.75.818] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Lee KH, Chang KJ, Cohen ML. First-principles calculations of the Coulomb pseudopotential micro*: Application to Al. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:1425-1428. [PMID: 9981185 DOI: 10.1103/physrevb.52.1425] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kielwein M, Saiki K, Roth G, Fink J, Paasch G, Egdell RG. High-energy electron-energy-loss study of sodium-tungsten bronzes. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:10320-10335. [PMID: 9977725 DOI: 10.1103/physrevb.51.10320] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Fleszar A, Quong AA, Eguiluz AG. Band-Structure and Many-Body Effects in the Dynamical Response of Aluminum Metal. PHYSICAL REVIEW LETTERS 1995; 74:590-593. [PMID: 10058796 DOI: 10.1103/physrevlett.74.590] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Schöne W, Ekardt W, Pacheco JM. Reintroduction of ionic structure in the self-consistent jellium model for metal clusters: Pseudopotential perturbation theory. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:11079-11087. [PMID: 9975217 DOI: 10.1103/physrevb.50.11079] [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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Aryasetiawan F, Karlsson K. Energy loss spectra and plasmon dispersions in alkali metals: Negative plasmon dispersion in Cs. PHYSICAL REVIEW LETTERS 1994; 73:1679-1682. [PMID: 10056856 DOI: 10.1103/physrevlett.73.1679] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Aryasetiawan F, Gunnarsson O. Product-basis method for calculating dielectric matrices. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:16214-16222. [PMID: 10010768 DOI: 10.1103/physrevb.49.16214] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Maddocks NE, Godby RW, Needs RJ. Ab initio calculations of the dynamic response of beryllium. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:8502-8505. [PMID: 10009624 DOI: 10.1103/physrevb.49.8502] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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