Emergent Intrinsic Ferromagnetism in Two-Dimensional Trigonal Rhodium Oxide

Zhenglong Fan; Yixin Liu; Xinyuan Wei; Wenxiang Zhu; Hui Huang; Qi Shao; Fan Liao; Mingwang Shao; Wei Li; Gang Mu; Yang Liu; Zhenhui Kang

doi:10.1021/acs.nanolett.3c03087

Emergent Intrinsic Ferromagnetism in Two-Dimensional Trigonal Rhodium Oxide

Nano Lett. 2023 Oct 25;23(20):9515-9521. doi: 10.1021/acs.nanolett.3c03087. Epub 2023 Oct 13.

Authors

Zhenglong Fan¹, Yixin Liu², Xinyuan Wei³, Wenxiang Zhu¹, Hui Huang¹, Qi Shao⁴, Fan Liao¹, Mingwang Shao¹, Wei Li³, Gang Mu², Yang Liu¹, Zhenhui Kang^{1

5}

Affiliations

¹ Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, Jiangsu, China.
² State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
³ State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
⁴ College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, China.
⁵ Macao Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Macau University of Science and Technology, Taipa 999078, Macao, China.

PMID: 37830516
DOI: 10.1021/acs.nanolett.3c03087

Abstract

Two-dimensional (2D) van der Waals single crystals with long-range magnetic order are the precondition and urgent task for developing a 2D spintronics device. In contrast to graphene and transition metal dichalcogenides, the study of 2D single-crystal metal oxides with intrinsic ferromagnetic properties remains a huge challenge. Here, we report a large-size trigonal single-crystal rhodium oxide (SC-Tri-RhO₂), with crystal parameters of a = b = 3.074 Å, c = 6.116 Å, and a space group of P3̅m1 (164), exhibiting strong ferromagnetism (FM) at a rather high temperature. Furthermore, theoretical calculations suggest that the ferromagnetism in SC-Tri-RhO₂ originates from spin splitting near the Fermi level, and the total magnetic moment is contributed mainly by the Rh atom.

Keywords: ferromagnetism; rhodium oxide; single crystal; two-dimensional; van der Waals.