Cu-Site Disorder in CuAl2O4 as Studied by XPS Spectroscopy

The results of full study of X-ray photoelectron spectra (XPS) of spin-liquid candidate CuAl 2 O 4 including the measurements of high-energy resolved core level (Cu , Al , O ), Cu LMM Auger and valence band spectra are presented. The comparison of obtained results with spectra of reference samples a...

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Veröffentlicht in:	JETP letters 2021-11, Vol.114 (9), p.556-560
Hauptverfasser:	Zhidkov, I. S., Belik, A. A., Kukharenko, A. I., Cholakh, S. O., Taran, L. S., Fujimori, A., Streltsov, S. V., Kurmaev, E. Z.
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum Atomic Augers Band spectra Biological and Medical Physics Biophysics Condensed Matter Copper Density functional theory Magnetic properties Molecular Optical and Plasma Physics Particle and Nuclear Physics Photoelectrons Physics Physics and Astronomy Quantum Information Technology Solid State Physics Spectrum analysis Spintronics Valence band X ray photoelectron spectroscopy
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Zusammenfassung:	The results of full study of X-ray photoelectron spectra (XPS) of spin-liquid candidate CuAl 2 O 4 including the measurements of high-energy resolved core level (Cu , Al , O ), Cu LMM Auger and valence band spectra are presented. The comparison of obtained results with spectra of reference samples and specially performed density functional theory calculations has confirmed a finite Cu site-disorder in CuAl 2 O 4 , where about 30% of Cu 2+ ions occupy the octahedral sites. Obtained valence band spectra can be used in further theoretical studies aimed on the investigation of electronic and magnetic properties of this mysterious ma-terial.
ISSN:	0021-3640 1090-6487
DOI:	10.1134/S0021364021210062