Low-lying electronic excitations and nonlinear optic properties of polymers via symmetrized density matrix renormalization group method

被引：60

作者：

Ramasesha, S

Pati, SK

Krishnamurthy, HR

Shuai, Z

Bredas, JL

机构：

[1] INDIAN INST SCI,DEPT PHYS,BANGALORE 560012,KARNATAKA,INDIA

[2] UNIV MONS,SERV CHIM MAT NOUVEAUX,CTR RECH ELECT & PHOTON MOL,B-7000 MONS,BELGIUM

来源：

SYNTHETIC METALS | 1997年 / 85卷 / 1-3期

关键词：

semiempirical models and model calculations; many-body and quasiparticle theories; excitation spectra calculations; models of non-linear phenomena; non-linear optical method;

D O I：

10.1016/S0379-6779(97)80136-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A symmetrized Density Matrix Renormalization Group procedure together with the correction vector approach is shown to be highly accurate for obtaining dynamic linear and third order polarizabilities of one-dimensional Hubbard and U - V models. The U - V model is seen to show characteristically different third harmonic generation response in the CDW and SDW phases. This can be rationalized from the excitation spectrum of the systems.

引用

页码：1019 / 1022

页数：4

共 19 条

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Bredas J. L., 1991, CONJUGATED POLYM

[2]

Chemia D. S., 1987, Nonlinear optical properties of organic molecules and crystals

[3]

Etemad S., 1991, SPECTROSCOPY ADV MAT, P87

[4]

KEISS HG, 1992, CONJUGATED CONDUCTIN