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Spin density wave in the strongly dimerized quasi-one-dimensional organic conductor (DMET-TTF)(2)AuBr2

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Title: Spin density wave in the strongly dimerized quasi-one-dimensional organic conductor (DMET-TTF)(2)AuBr2
Authors: Iida, Youhei Browse this author
Sawada, Masashi Browse this author
Sasaki, Yoshiaki Browse this author
Tsuchiya, Tomoaki Browse this author
Minamidate, Takaaki Browse this author
Matsunaga, Noriaki Browse this author →KAKEN DB
Kawamoto, Atsushi Browse this author
Nomura, Kazushige Browse this author
Issue Date: 4-Nov-2021
Publisher: American Physical Society (APS)
Journal Title: Physical Review B
Volume: 104
Issue: 18
Start Page: 184409
Publisher DOI: 10.1103/PhysRevB.104.184409
Abstract: At ambient pressure, studies of resistivity, magnetic susceptibility, and carbon-13 nuclear magnetic resonance (NMR) were conducted on the quasi-one-dimensional organic conductor (DMET-TTF)(2)AuBr2. Resistivity measurements showed a broad minimum at approximately 160 K, and the insulator behavior below this temperature and magnetic susceptibility results revealed a dip structure at 22 K. At the same temperature, a sharp peak in the temperature dependence of T-1(-1) associated with the antiferromagnetic (AFM). transition was found, along with drastic splitting of the NMR spectra, indicating a commensurate AFM structure. The amplitude of the magnetic moments was determined to be 0.06 mu(B)/molecule from the hyperfine coupling constant tensor and the angular dependence of the internal field in the AFM phase. The small magnetic moment signifies the AFM nesting type, i.e., commensurate spin density wave. An antiferromagnetic ordering of (up arrow up arrow down arrow down arrow) along the one-dimensional chain is expected from the 2k(F) instability. This behavior can be explained by the strong dimerization of the one-dimensional DMET-TTF chain.
Rights: ©2021 American Physical Society
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 松永 悟明

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