Lifetime effects and satellites in the photoelectron spectrum of tungsten metal
Visualitza/Obre
10.1103/PhysRevB.105.045129
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/364636
Tipus de documentArticle
Data publicació2022-01
EditorAmerican Physical Society
Condicions d'accésAccés obert
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Abstract
Tungsten (W) is an important and versatile transition metal and has a firm place at the heart of many technologies. A popular experimental technique for the characterization of tungsten and tungsten-based compounds is x-ray photoelectron spectroscopy (XPS), which enables the assessment of chemical states and electronic structure through the collection of core level and valence band spectra. However, in the case of tungsten metal, open questions remain regarding the origin, nature, and position of satellite features that are prominent in the photoelectron spectrum. These satellites are a fingerprint of the electronic structure of the material and have not been thoroughly investigated, at times leading to their misinterpretation. The present work combines high-resolution soft and hard x-ray photoelectron spectroscopy (SXPS and HAXPES) with reflected electron energy loss spectroscopy (REELS) and a multitiered ab initio theoretical approach, including density functional theory (DFT) and many-body perturbation theory (G0W0 and
GW
+
C
), to disentangle the complex set of experimentally observed satellite features attributed to the generation of plasmons and interband transitions. This combined experiment-theory strategy is able to uncover previously undocumented satellite features, improving our understanding of their direct relationship to tungsten's electronic structure. Furthermore, it lays the groundwork for future studies into tungsten-based mixed-metal systems and holds promise for the reassessment of the photoelectron spectra of other transition and post-transition metals, where similar questions regarding satellite features remain.
CitacióKalha, C. [et al.]. Lifetime effects and satellites in the photoelectron spectrum of tungsten metal. "Physical Review B", 2022, vol. 105, 045129.
ISSN2469-9950
2469-9969
2469-9969
Versió de l'editorhttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.045129
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Tungsten_post.pdf | 5,779Mb | Visualitza/Obre |