Open AccessElectronic structure of a Kondo lattice system CeCuAs2
Author(s) -
Sayantan Datta,
Ram Prakash Pandeya,
Arka Bikash Dey,
Christoph Schlueter,
A. Gloskovskii,
T. R. F. Peixoto,
A. Thamizhavel,
Kalobaran Maiti
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2164/1/012044
Subject(s) - valency , electronic structure , kondo effect , condensed matter physics , lattice (music) , kondo insulator , x ray photoelectron spectroscopy , photoemission spectroscopy , strongly correlated material , materials science , spectroscopy , physics , electron , nuclear magnetic resonance , quantum mechanics , philosophy , linguistics , acoustics
We study the electronic properties of a Ce-based Kondo material, CeCuAs 2 employing high-resolution hard x -ray photoemission spectroscopy. The measurements were done with different photon energies to probe the surface-bulk differences of the electronic structure. Experimental results show significant difference in the hybridization physics for the surface and bulk electronic structures indicating different Ce valency at the surface compared to the bulk. Surface termination appears to play an important role in the correlation physics of this system. In addition, the experimental spectra show loss features due to plasmon excitations. These results bring out complexity of this novel Kondo lattice system that does not show magnetic order down to the lowest temperature studied and have significantly different surface-bulk properties.