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Continuum Electronic States: The Tiresia Code. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27062026. [PMID: 35335385 PMCID: PMC8951385 DOI: 10.3390/molecules27062026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/11/2022] [Indexed: 11/17/2022]
Abstract
A multicenter (LCAO) B-spline basis is described in detail, and its capabilities concerning affording convergent solutions for electronic continuum states and wavepacket propagation are presented. It forms the core of the Tiresia code, which implements static-DFT and TDDFT hamiltonians, as well as single channel Dyson-DFT and Dyson-TDDFT descriptions to include correlation in the bound states. Together they afford accurate and computationally efficient descriptions of photoionization properties of complex systems, both in the single photon and strong field environments. A number of examples are provided.
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Ponzi A, Manson ST, Decleva P. Photoionization of C 60: Effects of Correlation on Cross Sections and Angular Distributions of Valence Subshells. J Phys Chem A 2020; 124:108-125. [PMID: 31769686 DOI: 10.1021/acs.jpca.9b09423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Calculations of the photoionization cross section and asymmetry parameter, β, are performed at the density functional theory (DFT) and time-dependent density functional theory (TDDFT) levels for all 32 valence levels of C60. Accurate numerical results are obtained for the isolated molecule in icosahedral symmetry. A detailed analysis based on the comparison between the DFT and TDDFT results allows the identification of four types of resonances: the well-known confinement resonances of mainly geometrical origin, shape resonances native to the ionization channel, induced shape resonances, and autoionization resonances brought about by interchannel coupling, as well as their different prominence in cross section or asymmetry parameter. Generally, cross sections are enhanced at the TDDFT level, which includes contribution from the bound-state excitations from closed channels, neglected at the DFT level, and the effect persists even well above the highest ionization threshold. This effect is best seen in the total cross section, although not as dramatic as found from simpler models, probably due to the stiffer electronic structure inherent in the full molecular description. The effects of interchannel coupling on individual native resonances are rather less predictable, leading to both enhancement and decreases and often altering the details of the structure significantly. A comparison with the previous accurate total cross-sectional calculations, as well as with the available experimental data, is very good for cross sections but slightly inferior for β's. The results reported can serve as a reference to compare the effects of different environments on C60, as well as chemical substitution, notably endohedral fullerenes.
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Affiliation(s)
- A Ponzi
- Department of Physical Chemistry , Institut Ruđer Bošković , Bijenička cesta 54 , 10000 Zagreb , Croatia
| | - S T Manson
- Department of Physics and Astronomy , Georgia State University , Atlanta , Georgia 30303 , United States
| | - P Decleva
- Dipartimento di Scienze Chimiche e Farmaceutiche , Universita' di Trieste , Via Giorgieri 1 , I-34127 Trieste , Italy.,CNR IOM , I-34149 Trieste , Italy
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Latzke DW, Ojeda-Aristizabal C, Denlinger JD, Reno R, Zettl A, Lanzara A. Orbital Character Effects in the Photon Energy and Polarization Dependence of Pure C 60 Photoemission. ACS NANO 2019; 13:12710-12718. [PMID: 31638764 DOI: 10.1021/acsnano.9b04536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Recent direct experimental observation of multiple highly dispersive C60 valence bands has allowed for a detailed analysis of the unusual photoemission traits of these features through photon energy- and polarization-dependent measurements. Previously obscured dispersions and strong photoemission traits are now revealed by specific light polarizations. The observed intensity effects prove the locking in place of the C60 molecules at low temperatures and the existence of an orientational order imposed by the substrate chosen. Most importantly, photon energy- and polarization-dependent effects are shown to be intimately linked with the orbital character of the C60 band manifolds which allow for a more precise determination of the orbital character within the third highest occupied molecular orbital (HOMO-2). Our observations and analysis provide important considerations for the connection between molecular and crystalline C60 electronic structure, past and future band structure studies, and for increasingly popular C60 electronic device applications, especially those making use of heterostructures.
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Affiliation(s)
- Drew W Latzke
- Applied Science and Technology , University of California , Berkeley , California 94720 , United States
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Claudia Ojeda-Aristizabal
- Department of Physics and Astronomy , California State University , Long Beach , California 90840 , United States
| | - Jonathan D Denlinger
- Advanced Light Source , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Ryan Reno
- Department of Physics and Astronomy , California State University , Long Beach , California 90840 , United States
| | - Alex Zettl
- Applied Science and Technology , University of California , Berkeley , California 94720 , United States
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
- Kavli Energy NanoSciences Institute at the University of California Berkeley and the Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Alessandra Lanzara
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
- Department of Physics , University of California , Berkeley , California 94720 , United States
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Ponzi A, Decleva P. Photoelectron Interference in Metallocenes: A Probe of Geometrical and Electronic Structure. J Phys Chem A 2014; 118:6692-8. [DOI: 10.1021/jp503863d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Ponzi
- Dipartimento di Scienze Chimiche
e Farmaceutiche, Università degli Studi di Trieste, via
L. Giorgieri 1, I-34127 Trieste, Italy
| | - P. Decleva
- Dipartimento di Scienze Chimiche
e Farmaceutiche, Università degli Studi di Trieste, via
L. Giorgieri 1, I-34127 Trieste, Italy
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Decleva P, Fronzoni G, Stener M. Giant correlation effects in the photoelectron spectrum of Ni(C3H5)2: clues from accurate calculation of ionization cross-sections. Theor Chem Acc 2012. [DOI: 10.1007/s00214-012-1185-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Plésiat E, Decleva P, Martín F. Vibrational branching ratios in the photoelectron spectra of N2 and CO: interference and diffraction effects. Phys Chem Chem Phys 2012; 14:10853-71. [DOI: 10.1039/c2cp40693d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Toffoli D, Stener M, Fronzoni G, Decleva P. Computational characterization of the HOMO-2 photoemission intensity oscillations in C60. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.10.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Stener M, Decleva P, Yamazaki M, Adachi JI, Yagishita A. O1s photoionization dynamics in oriented NO2. J Chem Phys 2011; 134:184305. [DOI: 10.1063/1.3584202] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Juranić PN, Lukić D, Barger K, Wehlitz R. Experimental evidence for modulations in the relative double-photoionization cross section of C60 from threshold up to 280 eV. PHYSICAL REVIEW LETTERS 2006; 96:023001. [PMID: 16486566 DOI: 10.1103/physrevlett.96.023001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2005] [Indexed: 05/06/2023]
Abstract
The relative double-photoionization cross section of neutral C60 clusters was investigated using monochromatized synchrotron radiation between 18 and 283 eV. Our measurement of the double-to-single photoionization ratio reveals two modulating components that are superimposed on a smooth ratio curve from threshold (19.0 eV) up to 280 eV, when inner-shell excitations become possible. The maxima in the modulation can be related to geometrical dimensions of the C60 cluster.
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Affiliation(s)
- P N Juranić
- Synchrotron Radiation Center, University of Wisconsin, Stoughton, Wisconsin 53589, USA
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Decleva P, Fronzoni G, Stener M, de Simone M, Coreno M, Green JC, Hazari N, Plekan O. Strong oscillations in molecular valence photoemission intensities. PHYSICAL REVIEW LETTERS 2005; 95:263401. [PMID: 16497086 DOI: 10.1103/physrevlett.95.263401] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2005] [Indexed: 05/06/2023]
Abstract
Photoemission from the two outermost ionizations [highest occupied molecular orbitals (HOMO and HOMO-1)] of Mg(eta(5)-C(5)H(5))(2) has been studied with synchrotron radiation in the gas phase. Strong oscillations in the HOMO-1/HOMO ratio, qualitatively similar to those well-known for fullerenes, are found. Excellent agreement with the experimental ratio is provided by accurate cross section calculations both at the density-functional theory and time-dependent density-functional theory level, indicating that a many electron response has a minor role for this effect. A comparison with the calculated values for other metal sandwich compounds indicate that the presence of oscillations is a widespread phenomenon, and a potential source of interesting information on the structural and electronic properties of the target molecule.
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Affiliation(s)
- Piero Decleva
- Dipartimento di Scienze Chimiche, Università di Trieste, Italy
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Rüdel A, Hentges R, Becker U, Chakraborty HS, Madjet ME, Rost JM. Imaging delocalized electron clouds: photoionization of C(60) in Fourier reciprocal space. PHYSICAL REVIEW LETTERS 2002; 89:125503. [PMID: 12225096 DOI: 10.1103/physrevlett.89.125503] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2002] [Indexed: 05/23/2023]
Abstract
The dynamics of the photoionization of the two outermost orbitals of C(60) has been studied in the oscillatory regime from threshold to the carbon K edge. We show that geometrical properties of the fullerene electronic hull, such as its diameter and thickness, are contained in the partial photoionization cross sections by examining ratios of partial cross sections as a function of the photon wave number in the Fourier conjugated space. Evaluated in this unconventional manner photoemission data reveal directly the desired spatial information.
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Affiliation(s)
- Andy Rüdel
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
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