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Abstract
We investigate the experimentally challenging CrCl3 surface by photon energy dependent photoemission (PE). The core and valence electrons after cleavage of a single crystal, either in a ultrahigh vacuum (UHV) or in air, are studied by keeping the samples at 150 1C, aiming at confirming the atomic composition with respect to the expected bulk atomic structure. A common spectroscopic denominator revealed by data is the presence of a stable, but only partially ordered Cl–O–Cr surface. The electronic core levels (Cl 2p, Cr 2p and 3p), the latter ones of cumbersome component determination, allowed us to quantify the electron charge transfer to the Cr atom as a net result of this modification and the increased exchange interaction between metal and ligand atoms. In particular, the analysis of multiplet components by the CMT4XPS code evidenced the charge transfer to be favored, and similarly the reduced crystal field due to the established polarization field. Though it is often claimed that a significant amount of Cl and Cr atomic vacancies has to be included, such a possibility can be excluded on the basis of the sign and the importance of the shift in the binding energy of core level electrons. The present methodological approach can be of great impact to quantify the structure of ordered sub-oxide phases occurring in mono or bi-layer Cr trihalides.
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Authors (8)
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S Kazim
- School of Science and Technology Physics Section University of Camerino, Via Madonna delle Carceri 9, 62032 Camerino, MC, Italy
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D Mastrippolito
- Dipartimento di Scienze Fisiche e Chimiche (DSFC), Universita` degli Studi dell’Aquila, Via Vetoio 10, 67100 L’Aquila, Italy
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Paolo Moras
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Matteo Jugovac
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Mohamad Al Ali
- Dipartimento di Scienze Fisiche e Chimiche (DSFC), Universita` degli Studi dell’Aquila, Via Vetoio 10, 67100 L’Aquila, Italy
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Luca Ottaviano
- Dipartimento di Scienze Fisiche e Chimiche (DSFC), Universita` degli Studi dell’Aquila, Via Vetoio 10, 67100 L’Aquila, Italy
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Roberto Gunnella
- School of Science and Technology Physics Section University of Camerino, Via Madonna delle Carceri 9, 62032 Camerino, MC, Italy
Cite as
Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1039/d2cp04586a
- License
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
no. 25,
pages 3806 - 3814,
ISSN: 1463-9076 - Language:
- English
- Publication year:
- 2023
- Bibliographic description:
- Kazim S., Mastrippolito D., Moras P., Jugovac M., Klimczuk T., Ali M. A., Ottaviano L., Gunnella R.: Synchrotron radiation photoemission spectroscopy of the oxygen modified CrCl3 surface// PHYSICAL CHEMISTRY CHEMICAL PHYSICS -Vol. 25,iss. 5 (2023), s.3806-3814
- DOI:
- Digital Object Identifier (open in new tab) 10.1039/d2cp04586a
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
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