Ion-Induced Surface Charge Dynamics in Freestanding Monolayers of Graphene and 
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 Probed by the Emission of Electrons

Niggas, Anna; Schwestka, Janine; Balzer, Karsten; Weichselbaum, David; Schlünzen, Niclas; Heller, R.; Creutzburg, Sascha; Inani, Heena; Tripathi, Mukesh; Speckmann, Carsten; McEvoy, Niall; Susi, Toma; Kotakoski, Jani; Gan, Ziyang; George, Antony; Turchanin, Andrey; Bönitz, M.; Aumayr, F.; Wilhelm, R.

doi:10.1103/physrevlett.129.086802

Cited by 18 publications

(19 citation statements)

References 71 publications

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“…The interatomic Coulombic decay, namely, suggests that many low-energy electrons should be emitted within the deexcitation cascade of the HCI. Follow-up experiments published in [68] confirmed this finding of mainly low-energy electrons with complex coincidence measurements of the electron energy distribution using a hemispherical energy analyser in addition to the retarding field analysis performed in [107].…”

Section: Energy Release: Secondary Particle Emissionsupporting

confidence: 59%

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Charge exchange of slow highly charged ions from an electron beam ion trap with surfaces and 2D materials

Niggas,

Werl,

Aumayr

et al. 2024

J. Phys. B: At. Mol. Opt. Phys.

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Electron beam ion traps allow studies of slow highly charged ion transmission through freestanding 2D materials as an universal testbed for surface science under extreme conditions. Here we review recent studies on charge exchange of highly charged ions in 2D materials. Since the interaction time with these atomically thin materials is limited to only a few femtoseconds, an indirect timing information will be gained. We will therefore discuss the interaction separated in three participating time regimes: energy deposition (charge exchange), energy release (secondary particle emission), and energy retention (material modification).

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Section: Energy Release: Secondary Particle Emissionsupporting

confidence: 59%

“…The former is used for electron emission statistics measurements, i.e. to measure the total number of emitted electrons per incident ion [67] and the HEA to determine the electron energy distribution [68]. The whole spectrometer is operated in a coincidence mode correlating ion and electron signals.…”

Section: Methodsmentioning

confidence: 99%

Charge exchange of slow highly charged ions from an electron beam ion trap with surfaces and 2D materials

Niggas,

Werl,

Aumayr

et al. 2024

J. Phys. B: At. Mol. Opt. Phys.

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“…Subsequent experiments indicated also a strong dependence of the charge state for energy loss in thin carbon foils. [ 41 ] Similar experiments were performed by our group, [ 42–44 ] followed by a theoretical model describing the charge state dependence of the nuclear stopping. [ 45 ]…”

Section: Discussionmentioning

confidence: 99%

“…Subsequent experiments indicated also a strong dependence of the charge state for energy loss in thin carbon foils. [41] Similar experiments were performed by our group, [42][43][44] followed by a theoretical model describing the charge state dependence of the nuclear stopping. [45] Based on previous findings on charge-state-enhanced kinetic sputtering the erosion yield from SDTrimSP may be increased by a factor of 5-8 and would then amount to approximately 200-350 atoms ion −1 .…”

Section: Kinetic Energy Effectmentioning

confidence: 91%

Charge‐State‐Enhanced Ion Sputtering of Metallic Gold Nanoislands

Szabo

Jany

Muckenhuber

et al. 2023

Small

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14]). Several recent experiments have shown that exotic states of matter can be generated by ultrashort pulses of external fields or energetic ions and that relaxation and decoherence can be strongly influenced by inter-particle correlations [15][16][17][18][19][20][21][22][23]. A versatile method to reliably describe the nonequilibrium scenarios of correlated many-body systems, in particular in extended systems and for extended periods of time, is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Non-equilibrium correlation dynamics in the one-dimensional Fermi-Hubbard model: A testbed for the two-particle reduced density matrix theory

Donsa¹,

Lackner²,

Burgdörfer³

et al. 2023

Preprint

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We explore the non-equilibrium dynamics of a one-dimensional Fermi-Hubbard system as a sensitive testbed for the capabilities of the time-dependent two-particle reduced density matrix (TD2RDM) theory to accurately describe time-dependent correlated systems. We follow the time evolution of the out-of-equilibrium finite-size Fermi-Hubbard model initialized by a quench over extended periods of time. By comparison with exact calculations for small systems and with matrix product state (MPS) calculations for larger systems but limited to short times, we demonstrate that the TD2RDM theory can accurately account for the non-equilibrium dynamics in the regime from weak to moderately strong inter-particle correlations. We find that the quality of the approximate reconstruction of the three-particle cumulant (or correlation) required for the closure of the equations of motion for the reduced density matrix is key to the accuracy of the numerical TD2RDM results. We identify the size of the dynamically induced three-particle correlations and the amplitude of cross correlations between the two-and three-particle cumulants as critical parameters that control the accuracy of the TD2RDM theory when current state-of-the art reconstruction functionals are employed.

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Ion-Induced Surface Charge Dynamics in Freestanding Monolayers of Graphene and MoS2 Probed by the Emission of Electrons

Cited by 18 publications

References 71 publications

Charge exchange of slow highly charged ions from an electron beam ion trap with surfaces and 2D materials

Charge exchange of slow highly charged ions from an electron beam ion trap with surfaces and 2D materials

Charge‐State‐Enhanced Ion Sputtering of Metallic Gold Nanoislands

Non-equilibrium correlation dynamics in the one-dimensional Fermi-Hubbard model: A testbed for the two-particle reduced density matrix theory

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