Strongly correlated electron insulators are one of the most important classes of materials in modern solid-state physics. We demonstrate that certain classes of Mott insulators, that usually are geometrically frustrated, exhibit unexpected charge effects: for certain spin textures, spontaneous circular electric currents or nonuniform charge distribution exist in the ground state of Mott insulators. In addition, low-energy magnetic states contribute comparably to the dielectric and magnetic response functions, epsilon(ik)(omega) and mu(ik)(omega), leading to interesting phenomena such as dipole-active ESR transitions, rotation of the electric-field polarization, and resonances which may be common to both functions producing a negative refraction index in a window of frequencies.
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