Spectral function of the one-dimensional Hubbard model away from half filling
Spectral function of the one-dimensional Hubbard model away from half filling
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DOI：
10.1103/physrevlett.92.256401
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发表时间：
2004-06-25
影响因子：
8.6
通讯作者：
Jeckelmann, E
中科院分区：
文献类型：
--
作者：
Benthien, H;Gebhard, F;Jeckelmann, E
利用动力学密度矩阵重整化群方法计算了一维Hubbard模型的光电子能谱函数。提出了一种计算有限开链中动量相关量的方法。与精确的Bethe分析结果的比较表明了我们方法的空前准确性。我们的研究结果表明，准一维导体TTF-TCNQ的光电子能谱提供的证据自旋电荷分离的尺度上的传导带宽。
We calculate the photoemission spectral function of the one-dimensional Hubbard model away from half filling using the dynamical density-matrix renormalization group method. An approach for calculating momentum-dependent quantities in finite open chains is presented. Comparison with exact Bethe ansatz results demonstrates the unprecedented accuracy of our method. Our results show that the photoemission spectrum of the quasi-one-dimensional conductor TTF-TCNQ provides evidence for spin-charge separation on the scale of the conduction bandwidth.