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arXiv 1605.09620cond-mat.str-el
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有限磁场下一维哈伯德模型的单电子奇异谱特征

One-electron singular spectral features of the 1D Hubbard model at finite magnetic field

J. M. P. Carmelo, T. Cadez

摘要:

研究了有限磁场下一维哈伯德模型的$σ=\uparrow,\downarrow$单电子谱函数中控制$(k,ω)$平面奇异性的指数对动量、电子密度、自旋密度和相互作用的依赖关系.对于所有的电子密度和自旋密度值以及与模型Bethe-anonymous解相关的旋转电子的整个有限排斥范围,定义了通常的单电子下Hubbard带和上Hubbard带的半填充概念。这种转动的电子是电子与赝费米子之间非微扰关系的纽带。我们的结果进一步阐明了赝费米子动力学理论解释基态和激发态能量本征态之间的$σ$单电子矩阵元的微观过程。

英文摘要:

The momentum, electronic density, spin density, and interaction dependences of the exponents that control the $(k,ω)$-plane singular features of the $σ=\uparrow,\downarrow$ one-electron spectral functions of the 1D Hubbard model at finite magnetic field are studied. The usual half-filling concepts of one-electron lower Hubbard band and upper Hubbard band are defined for all electronic density and spin density values and the whole finite repulsion range in terms of the rotated electrons associated with the model Bethe-ansatz solution. Such rotated electrons are the link of the non-perturbative relation between the electrons and the pseudofermions. Our results further clarify the microscopic processes through which the pseudofermion dynamical theory accounts for the $σ$ one-electron matrix elements between the ground state and excited energy eigenstates.

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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