TY - JOUR
T1 - Antiferromagnetic Mott insulating state in the single-component molecular material Pd(tmdt) 2
AU - Takagi, Rina
AU - Sari, Dita Puspita
AU - Mohd-Tajudin, Saidah Sakinah
AU - Ashi, Retno
AU - Watanabe, Isao
AU - Ishibashi, Shoji
AU - Miyagawa, Kazuya
AU - Ogura, Satomi
AU - Zhou, Biao
AU - Kobayashi, Akiko
AU - Kanoda, Kazushi
N1 - Funding Information:
The authors thank P. Biswas for experimental support. This work was supported by the JSPS Grants-in-Aid for Scientific Research (S) (Grant No. 25220709) and for Scientific Research (C) (Grants No. 17K05846 and No. 17K05532).
Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/12/26
Y1 - 2017/12/26
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.96.214432
DO - 10.1103/PhysRevB.96.214432
M3 - Article
AN - SCOPUS:85039460479
SN - 2469-9950
VL - 96
JO - Physical Review B
JF - Physical Review B
IS - 21
M1 - 214432
ER -