SrTiO3 surface micro-structuring with swift heavy ions in grazing incidence geometry

Rahali, R.; Lebius, H.; Benyagoub, A.; Gardes, E.; Guillous, S.; Monnet, I.; Sall, M.; Chauvat, Marie-Pierre; Marie, D.; Grygiel, C.

doi:10.1016/j.mtla.2023.101696

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…where Z 1 and Z 2 are the nuclear charges of the projectile and target atom, respectively, r is the inter-atomic distance, and ϕ(r/a F ) represents one particular interatomic "screening function ( Eqs 3,4)." In the simulation, the Thomas-Fermi-Moliere screening function was adopted [9]; [25]:…”

Section: Interaction Processmentioning

confidence: 99%

Energy losses of highly charged Arq+ ions during grazing incidence on tungsten surfaces

Xie,

Luo

2024

Front. Phys.

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In this study, we investigate the energy loss of highly charged ions interacting with various tungsten surfaces. The analysis primarily focuses on elucidating the impact of electron density distributions on energy loss of ions. Furthermore, we explore the correlation between surface azimuthal angles and energy loss under both uniform and inhomogeneous electron density distributions. Utilizing the classical over-the-barrier model (COBM), simulations involving trajectory calculations, energy loss, charge-exchange processes, and surface electron distributions, etc., were performed. Remarkably, the significant influence of axial channeling of surfaces on ion energy loss is observed. For the comparison of ion energy loss under uniform and inhomogeneous electron density distributions, the results reveal a more pronounced effect of electron density inhomogeneity on ion energy loss at higher energy-loss values. Additionally, the calculated energy-loss spectra of Ar16+ ions grazing on graphite surfaces show reasonable agreement with experimental data. These findings are crucial for understanding the surface structure of crystals.

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Section: Interaction Processmentioning

confidence: 99%

Energy losses of highly charged Arq+ ions during grazing incidence on tungsten surfaces

Xie,

Luo

2024

Front. Phys.

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Effect of oxygen-ion implantation on the local electronic structures of strontium-titanate single crystals: An investigation using synchrotron-based x-ray diffraction and x-ray photoemission techniques

Kumar,

Baral,

Kandasami

et al. 2024

Journal of Applied Physics

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The present study focuses on the oxygen (O)-ion implantation-induced structural and electronic modifications in the single crystals of strontium-titanate (s-STO) using synchrotron-based x-ray diffraction (XRD), x-ray photoemission spectroscopy (XPS), and resonant x-ray photoemission spectroscopy. The crystallinity of the epitaxially aligned phases of s-STO is confirmed through XRD. This direct evidence of heavy ion implantation is supported by the Monte Carlo-based simulation of stopping and range of ions in matter/transport of ions in matter. XPS at different core levels is performed to detect the exact oxidation state of Ti ions in s-STO. The dominance of Ti3+ over Ti4+ upon oxygen implantation suggests the disorder in the perovskite material, primarily in the form of oxygen vacancies (VO). The confirmation of VO is explicitly shown by the enhancement in the spectral area of the assigned peak in the O 1s XPS. Resonant photoemission spectroscopy measurements were performed by varying photon energy from 32 to 46 eV to understand the nature of the valence band electronic structure of s-STO. The resonance in the different hybridized states of s-STO is confirmed by the spectral features of constant initial state plots. There is a correlation between the defective state of Ti and the oxygen-deficient state. The transformation from SrTiO3 to SrTiO2.5, partially or completely, is essentially required to underline any modification in the electronic properties of s-STO. s-STO is in a mixed state of an ionic conductor and an electronic conductor. This study outlines the creation of VO due to O-ion implantation and investigates the changes in the electronic structures of s-STO.

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Path to ion-based pump-probe experiments: Generation of 18 picosecond keV Ne+ ion pulses from a cooled supersonic gas beam

Kalkhoff

Golombek

Schleberger

et al. 2023

Phys. Rev. Research

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SrTiO3 surface micro-structuring with swift heavy ions in grazing incidence geometry

Cited by 3 publications

References 28 publications

Energy losses of highly charged Arq+ ions during grazing incidence on tungsten surfaces

Energy losses of highly charged Arq+ ions during grazing incidence on tungsten surfaces

Effect of oxygen-ion implantation on the local electronic structures of strontium-titanate single crystals: An investigation using synchrotron-based x-ray diffraction and x-ray photoemission techniques

Path to ion-based pump-probe experiments: Generation of 18 picosecond keV Ne+ ion pulses from a cooled supersonic gas beam

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