Spin Dynamics in the Mixed Stack Charge Transfer Complex, (BEDO-TTF)(Cl2TCNQ)

被引：0
|
作者：
Hiraki, Ko-ichi [1 ]
Takahashi, Masashi [2 ]
Takahashi, Toshihiro [2 ]
Hasegawa, Tatsuo [3 ]
Kondo, Ryusuke [4 ]
Kagoshima, Seiichi [5 ]
机构：
[1] Fukushinia Med Univ, Fukushima 9601295, Japan
[2] Gakushuin Univ, Dept Phys, Toshima Ku, Tokyo 1718588, Japan
[3] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[4] Okayama Univ, Dept Phys, Okayama 7008530, Japan
[5] Univ Tokyo, Dept Arts & Sci, Meguro Ku, Tokyo 1538902, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2020年 / 89卷 / 07期
关键词：
NUCLEAR MAGNETIC-RELAXATION; TRANSITION;
D O I：
10.7566/JPSJ.89.074706
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
(CNMR)-C-13 measurements were performed to investigate the spin dynamics in the mixed stack charge transfer complex (BEDO-TTF)(Cl(2)TCNQ). localized spins on the donor and acceptor sites fluctuate paramagnetically following a Curie Weiss behavior at temperatures higher than 110K. The NMR shift dropped to zero and the relaxation rate T-1(-)1 decreased exponentially at temperatures below 110K. These results indicate that the system undergoes a transition into a nonmagnetic ground state with a finite spin gap. A large enhancement of the transverse relaxation rate T(2)(-)(1 )was observed at around 200 K. This suggests the possibility of the existence of anomalous spin dynamics in the paramagnetic state.
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页数：4
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