Antiferromagnetic Mott insulating state in the single-component molecular material Pd(tmdt)2

作     者：Rina Takagi Dita Puspita Sari Saidah Sakinah Mohd-Tajudin Retno Ashi Isao Watanabe Shoji Ishibashi Kazuya Miyagawa Satomi Ogura Biao Zhou Akiko Kobayashi Kazushi Kanoda 

作者机构：Department of Applied Physics University of Tokyo Bunkyo-ku Tokyo 113-8656 Japan Advanced Meson Science Laboratory RIKEN Nishina Center Wako Saitama 351-0198 Japan Department of Physics Graduate School of Science Osaka University Toyonaka Osaka 560-0043 Japan Department of Physics Faculty of Natural Science Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia Computational Chemistry and Physics Laboratory School of Distance Education Universiti Sains Malaysia Penang 11800 Malaysia Muon Spin Resonance Laboratory Department of Condensed Matter Physics Faculty of Science Hokkaido University Sapporo 060-0810 Japan Research Center for Computational Design of Advanced Functional Materials (CD-FMat) National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Ibaraki 305-8568 Japan Department of Chemistry College of Humanities and Sciences Nihon University Setagaya-ku Tokyo 156-8550 Japan 

出 版 物：《Physical Review B》 (Phys. Rev. B)

年 卷 期：2017年第96卷第21期

页      面：214432-214432页

核心收录：

基　　金：Japan Society for the Promotion of Science  JSPS  (17K05532  17K05846  25220709) 

主　　题：Antiferromagnets Mott insulators Muon spin resonance Nuclear magnetic resonance 

摘      要：A family of compounds built by a single molecular species, M(tmdt)2, with a metal ion, M, and organic ligands, tmdt, affords diverse electronic phases due to M-dependent interplays between d electrons in M, and π electrons in tmdt. We investigated the spin state in Pd(tmdt)2, a π-electron system without a d-electron contribution, through H1 nuclear magnetic resonance (NMR) and muon-spin resonance experiments. The temperature profiles of the NMR linewidth, relaxation rate, and asymmetry parameter in muon decay show an inhomogeneous antiferromagnetic order with moments distributed around ∼0.1μB that onsets at above 100 K. This result provides an example of the antiferromagnetic order in a pure π-electron system in M(tmdt)2, and it demonstrates that correlation among the π electrons is so strong as to give the Néel temperature over 100 K. The small and inhomogeneous moments are understandable as the crucial disorder effect in correlated electrons situated near the Mott transition.