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首页> 外文期刊>Computer physics communications >A Fortran 90 Hartree-Fock program for one-dimensional periodic π-conjugated systems using Pariser-Parr-Pople model
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A Fortran 90 Hartree-Fock program for one-dimensional periodic π-conjugated systems using Pariser-Parr-Pople model

机译:使用Pariser-Parr-Pople模型的一维周期π共轭系统的Fortran 90 Hartree-Fock程序

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摘要

Pariser-Parr-Pople (P-P-P) model Hamiltonian is employed frequently to study the electronic structure and optical properties of π-conjugated systems. In this paper we describe a Fortran 90 computer program which uses the P-P-P model Hamiltonian to solve the Hartree-Fock (HF) equation for infinitely long, one-dimensional, periodic, π-electron systems. The code is capable of computing the band structure, as also the linear optical absorption spectrum, by using the tight-binding and the HF methods. Furthermore, using our program the user can solve the HF equation in the presence of a finite external electric field, thereby, allowing the simulation of gated systems. We apply our code to compute various properties of polymers such as trans-polyacetylene, poly-para-phenylene, and armchair and zigzag graphene nanoribbons, in the infinite length limit.
机译:Pariser-Parr-Pople(P-P-P)模型哈密顿量经常用于研究π共轭体系的电子结构和光学性质。在本文中,我们描述了一个Fortran 90计算机程序,该程序使用P-P-P模型哈密顿量来求解无限长,一维,周期性π电子系统的Hartree-Fock(HF)方程。该代码能够通过使用紧密绑定和HF方法来计算能带结构以及线性光学吸收光谱。此外,使用我们的程序,用户可以在存在有限外部电场的情况下求解HF方程,从而可以模拟门控系统。我们将代码应用到无限长的范围内,以计算聚合物的各种特性,例如反式聚乙炔,聚对亚苯基以及扶手椅和之字形石墨烯纳米带。

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