TY - JOUR
T1 - Monomer Mott Insulator (BEDT-TTF)Cu[N(CN)2]2 as a Potential Nodal Line System
AU - Yoneyama, Naoki
AU - Nuryadin, Muhammad Khalish
AU - Tsumuraya, Takao
AU - Iguchi, Satoshi
AU - Takei, Takahiro
AU - Kumada, Nobuhiro
AU - Nagao, Masanori
AU - Tanaka, Isao
AU - Sasaki, Takahiko
N1 - Funding Information:
Acknowledgment The DFT calculations were conducted primarily at MASAMUNE at the Institute for Materials Research, Tohoku University, Japan. This study was performed under the GIMRT Program of the Institute for Materials Research, Tohoku University (Proposal No. 202012-RDKGE-0034) and was partly supported by JSPS KAKENHI Grant Numbers JP16K05747, JP19K21860, JP19H01833, JP21H05471, JP22H01149, and JP22H04459.
Publisher Copyright:
© 2022 The Physical Society of Japan.
PY - 2022/11/15
Y1 - 2022/11/15
N2 - We report the band structure calculations and experimental results for the resistivity and magnetic susceptibility in a spin-1=2 (BEDT-TTF)•+ monomer Mott insulator (BEDT-TTF)Cu[N(CN)2]2. The band calculations indicate a Dirac semimetal state with nodal lines at the Fermi level. The resistivity and magnetic susceptibility as functions of temperature were well interpreted in terms of the monomer Mott insulating state instead of the expected semimetal state, probably because of the strong electron correlation. In addition, we observed an Arrhenius-type steep reduction in the paramagnetic susceptibility below approximately 25 K, which indicates a spin-singlet ground state.
AB - We report the band structure calculations and experimental results for the resistivity and magnetic susceptibility in a spin-1=2 (BEDT-TTF)•+ monomer Mott insulator (BEDT-TTF)Cu[N(CN)2]2. The band calculations indicate a Dirac semimetal state with nodal lines at the Fermi level. The resistivity and magnetic susceptibility as functions of temperature were well interpreted in terms of the monomer Mott insulating state instead of the expected semimetal state, probably because of the strong electron correlation. In addition, we observed an Arrhenius-type steep reduction in the paramagnetic susceptibility below approximately 25 K, which indicates a spin-singlet ground state.
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U2 - 10.7566/JPSJ.91.113704
DO - 10.7566/JPSJ.91.113704
M3 - Article
AN - SCOPUS:85145474382
SN - 0031-9015
VL - 91
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 11
M1 - 113704
ER -