期刊
SCIENCE
卷 348, 期 6230, 页码 106-109出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1257340
关键词
-
资金
- Army Research Office [ARO W911NF-11-1-0379, ARO W911NF-12-1-0461]
- US National Science Foundation [DMR 1420541]
- DOE, Division of Basic Energy Sciences [DE-FG-02-08ER46544]
In frustrated quantum magnets, long-range magnetic order fails to develop despite a large exchange coupling between the spins. In contrast to the magnons in conventional magnets, their spin excitations are poorly understood. Here, we show that the thermal Hall conductivity kappa(xy) provides a powerful probe of spin excitations in the quantum spin ice pyrochlore Tb2Ti2O7. The thermal Hall response is large, even though the material is transparent. The Hall response arises from spin excitations with specific characteristics that distinguish them from magnons. At low temperature (<1 kelvin), the thermal conductivity resembles that of a dirty metal. Using the Hall angle, we construct a phase diagram showing how the excitations are suppressed by a magnetic field.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据