Eigenvalue analysis of the three-dimensional tight-binding model with non-Hermitian disorder

Eigenvalue analysis of the three-dimensional tight-binding model with non-Hermitian disorder
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非埃尔米特无序三维紧束缚模型的特征值分析

DOI:
10.1103/physrevb.103.224201
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发表时间:
2021
期刊:
影响因子:
3.7
通讯作者:
Terao Takamichi
Terao Takamichi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Kumagai Masahito;Komatsu Kazuhiko;Sato Masayuki;Kobayashi Hiroaki;Terao Takamichi

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在这项研究中,水平统计的三维紧束缚模型与非厄米特无序,介绍了Tzortzakakis,Makris和Economou(TME),及其变体进行了分析。采用平移-反演Arnoldi方法对TME模型的特征值进行了分析,得到了立方晶格的特征值。结果表明,在各向同性的TME模型中的临界紊乱的幅度大于在以前的数值研究较小的系统。研究了各向异性模型中的定域-离域转变。本文所采用的计算方法对于计算稀疏非厄米特矩阵的所有特征值的大规模分析是非常有效的。
In this study, the level statistics of the three-dimensional tight-binding model with non-Hermitian disorder, introduced by Tzortzakakis, Makris, and Economou (TME), and its variants were analyzed. The shift-and-invert Arnoldi method was used to analyze the eigenvalues of the TME model up to acubic lattice, which was larger than those used in previous studies. The results showed that the magnitude of critical disorders in the isotropic TME model was larger than that reported in previous numerical studies for smaller systems. The localization-delocalization transition in an anisotropic model was also investigated. The computational method adopted in this study was shown to be quite effective for large-scale analysis of the calculation of all eigenvalues of sparse non-Hermitian matrices.
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DOI: --
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