Spontaneous formation of vanadium "molecules" in a geometrically frustrated crystal:: AlV2O4

被引：105

作者：

Horibe, Y ^{[1
]}

Shingu, M

Kurushima, K

Ishibashi, H

Ikeda, N

Kato, K

Motome, Y

Furukawa, N

Mori, S

Katsufuji, T

机构：

[1] Osaka Prefecture Univ, Dept Phys, Osaka 5998531, Japan

[2] Waseda Univ, Dept Phys, Tokyo 1695551, Japan

[3] Aoyama Gakuin Univ, Dept Phys, Kanagawa 2298558, Japan

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.96.086406

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigated the charge-ordered (CO) state in spinel AlV2O4 by electron diffraction, synchrotron x-ray diffraction, and magnetic measurements. It was found that the CO structure appearing below 700 K is characterized by the formation of V clusters (heptamers), each of which is consisting of 7 vanadium atoms and is in a spin-singlet state as a total. Theoretical consideration indicates that this unique molecularlike V heptamer is stabilized by a strong bonding of vanadium t(2g) orbitals.

引用

页码：1 / 4

页数：4

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