共 25 条
Haldane State Formed by Oxygen Molecules Encapsulated in Single-Walled Carbon Nanotubes
被引:12
作者:
Hagiwara, Masayuki
[1
]
Ikeda, Masami
[1
]
Kida, Takanori
[1
]
Matsuda, Kazuyuki
[2
]
Tadera, Shin
[3
]
Kyakuno, Haruka
[3
]
Yanagi, Kazuhiro
[3
]
Maniwa, Yutaka
[3
]
Okunishi, Kouichi
[4
]
机构:
[1] Osaka Univ, Grad Sch Sci, Ctr Adv High Magnet Field Sci, Toyonaka, Osaka 5600043, Japan
[2] Kanagawa Univ, Fac Engn, Yokohama, Kanagawa 2218686, Japan
[3] Tokyo Metropolitan Univ, Dept Phys, Fac Sci, Hachioji, Tokyo 1920397, Japan
[4] Niigata Univ, Dept Phys, Fac Sci, Niigata 9502181, Japan
关键词:
CHAIN HEISENBERG-ANTIFERROMAGNET;
MAGNETIC-PROPERTIES;
WATER;
METAL;
D O I:
10.7566/JPSJ.83.113706
中图分类号:
O4 [物理学];
学科分类号:
0702 ;
摘要:
We report on the results of X-ray diffraction (XRD), magnetic susceptibility, and high-field magnetization measurements of oxygen molecules, which are unique magnetic homonuclear diatomic molecules with spin-1, encapsulated in single-walled carbon nanotubes (SWCNTs) with diameters of about 0.8 nm. Antiferromagnetic interactions between neighboring oxygen molecules are expected in SWCNTs, resulting in the formation of a spin-1 one-dimensional Heisenberg antiferromagnet, known as a Haldane magnet. The XRD pattern can be predicted accurately by considering the expected oxygen molecule alignment. The temperature evolution of the magnetic susceptibility and the high-field magnetization curve are typical of those for a Haldane magnet with spin-1. The results indicate that the Haldane state has been realized in a nanospaced material for the first time. This provides an alternative to the conventional condensed matter approach to forming quantum spin systems.
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