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arXiv 0709.4228cond-mat.str-el
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半填充Falicov-Kimball模型电荷密度波相位的谱性质

Spectral properties in the charge density wave phase of the half-filled Falicov-Kimball Model

S. R. Hassan, H. R. Krishnamurthy

摘要:

在动力学平均场论的框架下,研究了半满无自旋Falicov-Kimball模型的电荷密度波(CDW)相位的谱性质.我们提出了详细的结果作为温度和$U$的函数在CDW阶段的光谱函数。我们展示了非费米液相的接近如何影响CDW相,并表明在相图中有一个区域,在那里我们得到一个CDW相的谱函数中没有间隙。这是一个根本偏离平均场预测的间隙是成比例的序参量。

英文摘要:

We study the spectral properties of charge density wave (CDW) phase of the half-filled spinless Falicov-Kimball model within the framework of the Dynamical Mean Field Theory. We present detailed results for the spectral function in the CDW phase as function of temperature and $U$. We show how the proximity of the non-fermi liquid phase affects the CDW phase, and show that there is a region in the phase diagram where we get a CDW phase without a gap in the spectral function. This is a radical deviation from the mean-field prediction where the gap is proportional to the order parameter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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