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Deutsch M, Wirsing S, Kaiser D, Fink RF, Tegeder P, Engels B. Geometry relaxation-mediated localization and delocalization of excitons in organic semiconductors: A quantum chemical study. J Chem Phys 2020; 153:224104. [DOI: 10.1063/5.0028943] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- M. Deutsch
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg,, Emil-Fischer-Str. 42, D-97074 Würzburg, Germany
| | - S. Wirsing
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg,, Emil-Fischer-Str. 42, D-97074 Würzburg, Germany
| | - D. Kaiser
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg,, Emil-Fischer-Str. 42, D-97074 Würzburg, Germany
| | - R. F. Fink
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - P. Tegeder
- Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - B. Engels
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg,, Emil-Fischer-Str. 42, D-97074 Würzburg, Germany
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Holzmeier F, Wolf TJA, Gienger C, Wagner I, Bozek J, Nandi S, Nicolas C, Fischer I, Gühr M, Fink RF. Normal and resonant Auger spectroscopy of isocyanic acid, HNCO. J Chem Phys 2018; 149:034308. [DOI: 10.1063/1.5030621] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- F. Holzmeier
- Institut des Sciences Moléculaire d’Orsay (CNRS), Université Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - T. J. A. Wolf
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - C. Gienger
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany
| | - I. Wagner
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - J. Bozek
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - S. Nandi
- Department of Physics, Lund University, 221 00 Lund, Sweden
| | - C. Nicolas
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - I. Fischer
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - M. Gühr
- Institut für Physik und Astronomie Universität Potsdam, 14476 Potsdam, Germany
| | - R. F. Fink
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany
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Stehr V, Fink RF, Tafipolski M, Deibel C, Engels B. Comparison of different rate constant expressions for the prediction of charge and energy transport in oligoacenes. WIREs Comput Mol Sci 2016. [DOI: 10.1002/wcms.1273] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- V. Stehr
- Institut für Physikalische und Theoretische Chemie; Universität Würzburg; Würzburg Germany
| | - R. F. Fink
- Institut für Physikalische und Theoretische Chemie; Universität Tübingen; Tübingen Germany
| | - M. Tafipolski
- Institut für Physikalische und Theoretische Chemie; Universität Würzburg; Würzburg Germany
| | - C. Deibel
- Institut für Physik; Technische Universität Chemnitz; Chemnitz Germany
| | - B. Engels
- Institut für Physikalische und Theoretische Chemie; Universität Würzburg; Würzburg Germany
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Stehr V, Engels B, Deibel C, Fink RF. Anisotropy of singlet exciton diffusion in organic semiconductor crystals from ab initio approaches. J Chem Phys 2014; 140:024503. [DOI: 10.1063/1.4858464] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sekushin V, Püttner R, Fink RF, Martins M, Jiang YH, Aksela H, Aksela S, Kaindl G. A comprehensive study of the vibrationally resolved S 2p−1 Auger electron spectrum of carbonyl sulfide. J Chem Phys 2012; 137:044310. [PMID: 22852621 DOI: 10.1063/1.4734310] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- V Sekushin
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin-Dahlem, Germany
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Eland JHD, Fink RF, Linusson P, Hedin L, Plogmaker S, Feifel R. Single and multiple photoionisation of H2S by 40–250 eV photons. Phys Chem Chem Phys 2011; 13:18428-35. [DOI: 10.1039/c1cp21654f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fink RF, Piancastelli MN, Grum-Grzhimailo AN, Ueda K. Angular distribution of Auger electrons from fixed-in-space and rotating C 1s-->2pi photoexcited CO: theory. J Chem Phys 2009; 130:014306. [PMID: 19140614 DOI: 10.1063/1.3042153] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The one-center approach for molecular Auger decay is applied to predict the angular distribution of Auger electrons from rotating and fixed-in-space molecules. For that purpose, phase shifts between the Auger decay amplitudes have been incorporated in the atomic model. The approach is applied to the resonant Auger decay of the photoexcited C 1s-->2pi resonance in carbon monoxide. It is discussed how the symmetry of the final ionic state is related to features in the angular distributions and a parametrization for the molecular frame Auger electron angular distribution is suggested. The angular distribution of Auger electrons after partial orientation of the molecule by the sigma-->pi-excitation process is also calculated and compared to available experimental and theoretical data. The results of the one-center approach are at least of the same quality as the available theoretical data even though the latter stem from a much more sophisticated method. As the one-center approximation can be applied with low computational demand even to extended systems, the present approach opens a way to describe the angular distribution of Auger electrons in a wide variety of applications.
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Affiliation(s)
- R F Fink
- Institute of Organic Chemistry, University of Würzburg, D-97074 Würzburg, Germany.
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Rolles D, Prümper G, Fukuzawa H, Liu XJ, Pesić ZD, Fink RF, Grum-Grzhimailo AN, Dumitriu I, Berrah N, Ueda K. Molecular-frame angular distributions of resonant CO:C(1s) Auger electrons. Phys Rev Lett 2008; 101:263002. [PMID: 19437639 DOI: 10.1103/physrevlett.101.263002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The molecular-frame angular distributions of resonantly excited CO:C(1s) --> pi* Auger electrons were determined using angle-resolved electron-ion coincidence spectroscopy in combination with a novel transformation procedure. Our new methodology yields full three-dimensional electron angular distributions with high energy resolution from the measurement of electrons at only two angles. The experimentally determined distributions are well reproduced by calculations performed in a simple one-center approximation, allowing an unambiguous identification of several overlapping Auger lines.
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Affiliation(s)
- D Rolles
- Physics Department, Western Michigan University, Kalamazoo, Michigan 49008, USA
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Lindblad A, Fink RF, Bergersen H, Lundwall M, Rander T, Feifel R, Ohrwall G, Tchaplyguine M, Hergenhahn U, Svensson S, Björneholm O. Postcollision interaction in noble gas clusters: Observation of differences in surface and bulk line shapes. J Chem Phys 2005; 123:211101. [PMID: 16356028 DOI: 10.1063/1.2135771] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The surface and bulk components of the x-ray photoelectron spectra of free noble gas clusters are shown to display differences in the influence of postcollision interaction between the photoelectron and the Auger electron on the spectral line shape; the bulk component is observed to be less affected than the surface and atomic parts of the spectra. A model for postcollision interaction in nonmetallic solids and clusters is also provided which takes the polarization screening into account. Core-level photoelectron spectra of Ar, Kr, and Xe have been recorded to verify the dependence of the postcollision interaction effect on the polarizability of the sample.
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Affiliation(s)
- A Lindblad
- Department of Physics, Uppsala University, Box 530, SE-751 21 Uppsala, Sweden.
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Ohrwall G, Fink RF, Tchaplyguine M, Ojamäe L, Lundwall M, Marinho RRT, Naves de Brito A, Sorensen SL, Gisselbrecht M, Feifel R, Rander T, Lindblad A, Schulz J, Saethre LJ, Mårtensson N, Svensson S, Björneholm O. The electronic structure of free water clusters probed by Auger electron spectroscopy. J Chem Phys 2005; 123:054310. [PMID: 16108642 DOI: 10.1063/1.1989319] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
(H2O)(N) clusters generated in a supersonic expansion source with N approximately 1000 were core ionized by synchrotron radiation, giving rise to core-level photoelectron and Auger electron spectra (AES), free from charging effects. The AES is interpreted as being intermediate between the molecular and solid water spectra showing broadened bands as well as a significant shoulder at high kinetic energy. Qualitative considerations as well as ab initio calculations explain this shoulder to be due to delocalized final states in which the two valence holes are mostly located at different water molecules. The ab initio calculations show that valence hole configurations with both valence holes at the core-ionized water molecule are admixed to these final states and give rise to their intensity in the AES. Density-functional investigations of model systems for the doubly ionized final states--the water dimer and a 20-molecule water cluster--were performed to analyze the localization of the two valence holes in the electronic ground states. Whereas these holes are preferentially located at the same water molecule in the dimer, they are delocalized in the cluster showing a preference of the holes for surface molecules. The calculated double-ionization potential of the cluster (22.1 eV) is in reasonable agreement with the low-energy limit of the delocalized hole shoulder in the AES.
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Affiliation(s)
- G Ohrwall
- Department of Physics, Uppsala University, P.O. Box 530, SE-751 21 Uppsala, Sweden.
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Kukk E, Bozek JD, Cheng WT, Fink RF, Wills AA, Berrah N. Auger decay of the C 1s−12π* resonance in carbon monoxide: Vibrationally and angularly resolved spectra. J Chem Phys 1999. [DOI: 10.1063/1.480337] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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