Fermi-edge singularity in one-dimensional systems.
Fermi-edge singularity in one-dimensional systems.
复制标题
一维系统中的费米边奇点。
DOI：
10.1103/physrevlett.68.3638
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发表时间：
1992
影响因子：
8.6
通讯作者：
Nagaosa
中科院分区：
文献类型：
--
作者：
Ogawa;Furusaki;Nagaosa
利用一维(1D)系统的Tomonaga-Luttinger模型，从理论上研究了光谱中的费米边奇异性。对于任意质量的价空穴，考虑电子关联，得到了其临界指数的解析表达式。在一维情况下，指数与空穴动力学无关，这与二维和三维情况形成了鲜明的对比。传导电子之间的弱排斥相互作用使边缘谱中的幂函数峰变得尖锐
The Fermi-edge singularity in optical spectra is studied theoretically using the Tomonaga-Luttinger model for one-dimensional (1D) systems. Its critical exponent is obtained analytically for an arbitrary mass of a valence hole taking into account the electronic correlation. The exponent is found to be independent of the hole dynamics in 1D, which is in striking contrast to the 2D and 3D cases. Weak repulsive interaction among the conduction electrons sharpens the power-law peak in the edge spectrum