Universität zu Köln

Yun, Seokhwan, Lee, Ki Hoon, Kim, Chaebin ORCID: 0000-0001-5392-7756, Park, Junghwan, Kim, Min-Gyu, Cho, Deok-Yong ORCID: 0000-0001-5789-8286, Khomskii, D., I and Park, Je-Geun ORCID: 0000-0002-3930-4226 (2021). Effects of Mn-substitution on the valence bond solid in Li2RuO3. Phys. Rev. B, 103 (3). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

Full text not available from this repository.

Abstract

Li2RuO3 with a honeycomb structure undergoes a drastic transition from a regular honeycomb lattice with the C2/m space group to a valence-bond solid state of the P2(1)/m space group with an extremely strong dimerization at 550 K. We synthesized Li2Ru1-xMnxO3 with a full solid solution and investigated doping effects on the valence-bond solid state as a function of Mn content. The valence-bond solid state is found to be stable up to x = 0.2, based on our extensive experiments: structural studies, resistivity, and magnetic susceptibility. On the other hand, the extended x-ray absorption fine-structure analyses show that the dimer local structure remains robust even above x = 0.2 with a minimal effect on the dimer bond length. This indicates that the locally disordered dimer structure survives well into the Mn-rich phase even though the thermodynamically stable average structure has the C2/m space group. Our results prove that the dimer formation in Li2RuO3 is predominantly a local phenomenon driven by the formation of orbitally assisted metal-metal bonds and that these dimers are relatively robust against doping-induced disorder.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Yun, Seokhwan UNSPECIFIED UNSPECIFIED UNSPECIFIED Lee, Ki Hoon UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Chaebin UNSPECIFIED orcid.org/0000-0001-5392-7756 UNSPECIFIED Park, Junghwan UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Min-Gyu UNSPECIFIED UNSPECIFIED UNSPECIFIED Cho, Deok-Yong UNSPECIFIED orcid.org/0000-0001-5789-8286 UNSPECIFIED Khomskii, D., I UNSPECIFIED UNSPECIFIED UNSPECIFIED Park, Je-Geun UNSPECIFIED orcid.org/0000-0002-3930-4226 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-595043
DOI:	10.1103/PhysRevB.103.035151
Journal or Publication Title:	Phys. Rev. B
Volume:	103
Number:	3
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 Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59504