Mechanism of Interatomic Coulombic Decay in Clusters

Averbukh, Vitali; Müller, Imke; Cederbaum, Lorenz S.

doi:10.1103/physrevlett.93.263002

Cited by 172 publications

(199 citation statements)

References 23 publications

Supporting

Mentioning

192

Contrasting

Order By: Relevance

“…It is obtained using the multipole expansion of the electron-electron interaction term which couples the electronic motion on the centers A and B and drives the interatomic decay [18,19]. Equations (9) and (10) mean that dICEC also dominates for small R and E vph .…”

Section: Epj Web Of Conferencesmentioning

confidence: 99%

Interatomic Coulombic electron capture in atomic, molecular, and quantum dot systems

Bande

Pont

Gokhberg

et al. 2015

EPJ Web of Conferences

Self Cite

View full text Add to dashboard Cite

Abstract. The interatomic Coulombic electron capture (ICEC) process has recently been predicted theoretically for clusters of atoms and molecules. For an atom A capturing an electron e( ) it competes with the well known photorecombination, because in an environment of neutral or anionic neighboring atoms B, A can transfer its excess energy in the ultrafast ICEC process to B which is then ionized. The cross section for e( ) + A + B → A − + B + + e( ) has been obtained in an asymptotic approximation based on scattering theory for several clusters [1,2]. It was found that ICEC starts dominating the PR for distances among participating species of nanometers and lower. Therefore, we believe that the ICEC process might be of importance in the atmosphere, in biological systems, plasmas, or in nanostructured materials. As an example for the latter, ICEC has been investigated by means of electron dynamics in a model potential for semiconductor double quantum dots (QDs) [3]. In the simplest case one QD captures an electron while the outgoing electron is emitted from the other. The reaction probability for this process was found to be relatively large.

show abstract

Section: Epj Web Of Conferencesmentioning

confidence: 99%

Interatomic Coulombic electron capture in atomic, molecular, and quantum dot systems

Bande

Pont

Gokhberg

et al. 2015

EPJ Web of Conferences

Self Cite

View full text Add to dashboard Cite

show abstract

“…1(a), right pathway]. The contributions from these two integrals to the decay rates depend very differently on the internuclear distance R of the involved atoms [12,13]. The exchange integral requires some overlap of the two wave functions, and thus the decay rate exponentially decreases with increasing R, whereas the direct term decreases more gently and survives at large R where the overlap of the wave function is negligible [6].…”

mentioning

confidence: 99%

“…(2) [ 13]: the 2s hole in the left atom is filled with a 2p electron in the same atom by the virtual photon emission, and a 2p electron in the right atom is ejected by the virtual photon absorption. The ICD rate due to this virtual photon exchange is proportional to 1=R 6 at large internuclear distances [13].…”

mentioning

confidence: 99%

Experimental Separation of Virtual Photon Exchange and Electron Transfer in Interatomic Coulombic Decay of Neon Dimers

et al. 2007

View full text Add to dashboard Cite

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Experimental separation of virtual photon exchange and electron transfer in interatomic Coulombic decay of neon dimers Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1103/PhysRevLett.99.153401Physical Review Letters, 99, pp. 153401-1-153401-4, 2007-10-12 Experimental Separation of Virtual Photon Exchange and Electron Transfer in InteratomicCoulombic Decay of Neon Dimers We investigate the interatomic Coulombic decay (ICD) of neon dimers following photoionization with simultaneous excitation of the ionized atom (shakeup) in a multiparticle coincidence experiment. We find that, depending on the parity of the excited state, which determines whether ICD takes place via virtual dipole photon emission or overlap of the wave functions, the decay happens at different internuclear distances, illustrating that nuclear dynamics heavily influence the electronic decay in the neon dimer.

show abstract

“…1) involves the decay of a photo-excited electron-hole pair via annihilation of the hole by another electron, with simultaneous emission of an electron from a bound state to the continuum [1]. The rate is governed (in a Fermi golden rule framework) by both direct and exchange Coulomb integrals [2]. For photo-excited holes in inner-valence or core states, the associated orbitals are well localized on a given atom, such that Auger spectra are typically dominated by atom-specific transitions.…”

mentioning

confidence: 99%

Importance of Electronic Relaxation for Inter-Coulombic Decay in Aqueous Systems

2010

View full text Add to dashboard Cite

Inspired by recent photoelectron spectroscopy experiments on hydroxide solutions, we have examined the conditions necessary for enhanced (and, in the case of solutions, detectable) inter-Coulombic decay (ICD)-Auger emission from an atomic site other than that originally excited. We present general guidelines, based on energetic and spatial overlap of molecular orbitals, for this enhancement of inter-Coulombic decay-based energy transfer in solutions. These guidelines indicate that this decay process should be exhibited by broad classes of biomolecules and suggest a design criterion for targeted radiooncology protocols. Our findings show that photoelectron spectroscopy cannot resolve the current hydroxide coordination controversy.An Auger process (see Fig. 1) involves the decay of a photo-excited electron-hole pair via annihilation of the hole by another electron, with simultaneous emission of an electron from a bound state to the continuum [1]. The rate is governed (in a Fermi golden rule framework) by both direct and exchange Coulomb integrals [2]. For photo-excited holes in inner-valence or core states, the associated orbitals are well localized on a given atom, such that Auger spectra are typically dominated by atom-specific transitions. Atomic and molecular phases comprise mainly localized electronic orbitals, and the decay rate is consequently quite small for processes involving electron emission from any atomic site other than that originally excited. In such systems, this type of ''off-site'' emission has been labeled as ICD, inter-Coulombic (atomic or molecular) decay [3].Although ICD has been studied primarily in the context of valence excitations [3][4][5], recent experiments have shown that core-excited systems may also decay in this fashion, as shown schematically in Fig. 1 [6]. Panel (a) depicts the instantaneous ground-state potential landscape and electron configuration for two atoms separated by some distance. The core electrons have energy substantially lower than the valence electrons and are tightly bound to the atomic nucleus, screening the nuclear charge Z such that the valence electrons are subject to an effective nuclear Coulomb potential proportional to Zeff ¼ Z _ 2, consistent with Gauss's law. (For the purpose of this discussion, we assume that A and B are atoms of first-row elements with 1s core electrons only.) These effective potentials, when added together, give rise to the multiple-Coulombwell landscape shown in Fig. 1(a), which will support some localized bound states and additional bonding states spanning multiple atomic centers. Core excitation of a given atom [ Fig. 1(b)] will increment the effective nuclear charge, steepening the local potential landscape at that site. This will cause a sudden downward shift in the energy of some electronic states, which in some cases may prevent coupling with states from neighboring atomic sites, or in others may lead to new electronic hybridization via tunneling through the resulting potential barrier. The key point for the present work is t...

show abstract

Mechanism of Interatomic Coulombic Decay in Clusters

Cited by 172 publications

References 23 publications

Interatomic Coulombic electron capture in atomic, molecular, and quantum dot systems

Interatomic Coulombic electron capture in atomic, molecular, and quantum dot systems

Experimental Separation of Virtual Photon Exchange and Electron Transfer in Interatomic Coulombic Decay of Neon Dimers

Importance of Electronic Relaxation for Inter-Coulombic Decay in Aqueous Systems

Contact Info

Product

Resources

About