Universität zu Köln

Okamoto, J., Chainani, A., Chen, Z. Y., Huang, H. Y., Singh, A., Sasagawa, T., Khomskii, D. I., Fujimori, A., Chen, C. T. and Huang, D. J. (2021). Evolution of valence- and spin-specific local distortions in La2-xSrxCoO4. Phys. Rev. B, 104 (5). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We present x-ray spectral evidence for the evolution of valence- and spin-specific tetragonal distortions in single-layer cobaltates. Measurements of Co L-3-edge resonant inelastic x-ray scattering reveal the t(2g) electronic structure of Co in hole-doped La2-xSrxCoO4 (x = 0.5, 0.7, and 0.8). As the Sr-doping x increases, the tetragonal splitting of the t(2g) states of high-spin Co2+ decreases, whereas that of low-spin Co3+ increases and the population fraction of high-spin Co3+ increases. The results enable us to clarify the origin of the change of magnetic anisotropy and in-plane resistivity in the mixed-valence cobaltates caused by the interplay of spin-orbit coupling and tetragonal distortion.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Okamoto, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chainani, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chen, Z. Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Huang, H. Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Singh, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sasagawa, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Khomskii, D. I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fujimori, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chen, C. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Huang, D. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-590544
DOI:	10.1103/PhysRevB.104.054417
Journal or Publication Title:	Phys. Rev. B
Volume:	104
Number:	5
Date:	2021
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRANSITION; SUPERCONDUCTIVITY; REORIENTATION; OXIDES; CHARGE; STATE Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59054