Electron spectra close to a metal-to-insulator transition
Electron spectra close to a metal-to-insulator transition
复制标题
接近金属到绝缘体转变的电子光谱
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
G. Uhrig
中科院分区：
文献类型：
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作者：
M. Karski;C. Raas;G. Uhrig
提出了动态平均场理论中接近金属到绝缘体转变的电子能谱的高分辨率研究。提供了零温度平滑过渡的全数字一致确认。特别是验证了能量尺度的分离。出乎意料的是，哈伯德带内边缘处的尖峰出现在金属状态中。它们是单粒子激发和集体模式之间重要相互作用的标志。
A high-resolution investigation of the electron spectra close to the metal-to-insulator transition in dynamic mean-field theory is presented. An all-numerical, consistent confirmation of a smooth transition at zero temperature is provided. In particular, the separation of energy scales is verified. Unexpectedly, sharp peaks at the inner Hubbard band edges occur in the metallic regime. They are signatures of the important interaction between single-particle excitations and collective modes.