NMR evidence for Mott-Hubbard localization in (NH3)K3C60

被引：40

作者：

Tou, H

Maniwa, Y

Iwasa, Y

Shimoda, H

Mitani, T

机构：

[1] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo 1920397, Japan

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

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.62.R775

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

C-13, H-1, and K-39-NMR measurements of (NH3)K3C60 unambiguously demonstrated that its magnetic properties are described as a S = 1/2 localized spin system over the entire temperature range (300 K-4.2 K). A possible antiferromagnetic structure that appeared below 45 K is compatible with the orientational order of KNH3 pairs on the octahedral (O) site. The present NMR study strongly suggests that the Mott-Hubbard localization occurs due to the removal of the C-60 t(1u)-orbital degeneracy.

引用

收藏

页码：R775 / R778

页数：4

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