Spin chirality, Berry phase, and anomalous Hall effect in a frustrated ferromagnet

被引：746

作者：

Taguchi, Y ^{[1
]}

Oohara, Y

Yoshizawa, H

Nagaosa, N

Tokura, Y

机构：

[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[2] Univ Tokyo, Inst Solid State Phys, Neutron Scattering Lab, Tokai, Ibaraki 3191106, Japan

[3] CERC, Tsukuba, Ibaraki 3050046, Japan

[4] JRCAT, Tsukuba, Ibaraki 3050046, Japan

来源：

SCIENCE | 2001年 / 291卷 / 5513期

关键词：

D O I：

10.1126/science.1058161

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

An electron hopping on non-coplanar spin sites with spin chirality obtains a complex phase factor (Berry phase) in its quantum mechanical amplitude that acts as an internal magnetic field, and is predicted to manifest itself in the Hall effect when it is not cancelled. The present combined work of transport measurement, neutron scattering, and theoretical calculation provides evidence that the gigantic anomalous Hall effect observed in Nd2Mo2O7, a pyrochlore ferromagnet with geometrically frustrated Lattice structure, is mostly due to the spin chirality and the associated Berry phase originating from the Mo spin tilting.

引用

页码：2573 / 2576

页数：4

共 18 条

[1] MAGNETIC AND ELECTRICAL-PROPERTIES OF R2MO2O7 PYROCHLORE COMPOUNDS [J].