期刊
NATURE PHYSICS
卷 5, 期 6, 页码 403-406出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS1275
关键词
-
资金
- CSIR, Government of India
The fractional quantum Hall state(1) is a quintessential system for the study of collective quantum behaviour. In such a system, the collective behaviour results in the creation of so-called composite fermions, quasi-particles formed by electrons attached to magnetic flux quanta. Recently, a new collective mode was unexpectedly observed in Raman scattering experiments(2) on such a system as it was found to split off from the familiar 'fundamental' long-wavelength mode on increase of the wave vector. Here, we present results from extensive theoretical calculations that make a compelling case that this mode corresponds to an excitation of a composite fermion across two Lambda levels-effective kinetic energy levels resembling Landau levels for such particles. In addition to explaining why this excitation merges with the fundamental mode in the long-wavelength limit, our theory also provides a good quantitative account of the amount of splitting, and makes several experimentally verifiable predictions.
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