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TT: Fachverband Tiefe Temperaturen

TT 87: Frustrated Magnets: Spin Liquids

TT 87.3: Talk

Friday, March 22, 2024, 10:00–10:15, H 3010

Low-temperature spin state in an organic spin-liquid candidate κ-(BEDT-TTF)₂Cu₂(CN)₃ investigated by magnetization measurements — •Eria Imada^{1, 2}, Yosuke Matsumoto², Pal Sudip³, Naoki Yoneyama⁴, Martin Dressel³, Takahiko Sasaki⁵, Kazushi Kanoda^{1, 2, 3}, and Hidenori Takagi^{1, 2, 3} — ¹The University of Tokyo, Tokyo, Japan — ²Max-Planck-Institute, Stuttgart, Germany — ³University of Stuttgart, Stuttgart, Germany — ⁴Yamanashi University, Kofu, Japan — ⁵Tohoku University, Sendai, Japan

The ground state of the organic quantum spin liquid candidate, κ-(BEDT-TTF)₂Cu₂(CN)₃, is under debate. We report our detailed DC magnetization M measurements. M(T) on cooling shows a rapid decrease with a clear kink at 6K but an appreciable residual contribution, nearly liner in magnetic field up to 7 T, remains even at 2 K. We discuss possible origin of the low temperature residual contribution.

Keywords: Quantum spin liquid; Triangular lattice; Organic system; Molecular magnet