Antiferromagnetism and phase diagram in ammoniated alkali fulleride salts

被引：54

作者：

Takenobu, T ^{[1
]}

Muro, T ^{[1
]}

Iwasa, Y ^{[1
]}

Mitani, T ^{[1
]}

机构：

[1] Japan Adv Inst Sci & Technol, Tatsunokuchi, Ishikawa 9231292, Japan

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.85.381

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Intercalation of neutral ammonia molecules into trivalent face-centered-cubic (fcc) fulleride superconductors induces a dramatic change in electronic states. Monoammoniated alkali fulleride salts (NH3)K3-xRbxC60, forming an isostructural orthorhombic series, undergo an antiferromagnetic transition, which was found by the electron spin resonance experiment. The Neel temperature first increases with the interfullerene spacing and then decreases for (NH3)Rb3C60, forming a maximum at 76 K. This feature is explained by the generalized phase diagram of Mott-Hubbard transition with an antiferromagnetic ground state.

引用

页码：381 / 384

页数：4

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