CHAIN-END EFFECTS IN SU-SCHRIEFFER-HEEGER-TYPE MODELS OF ALTERNATING TRANS-POLYACETYLENE

被引：25

作者：

FORNER, W

机构：

[1] Friedrich-Alexander Univ, Germany

来源：

SYNTHETIC METALS | 1989年 / 30卷 / 02期

关键词：

Electrons;

D O I：

10.1016/0379-6779(89)90784-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Finite chain-length effects on soliton dynamics in Su-Schrieffer-Heeger-type models for trans-polyacetylene are reported, indicating that for the frequently used value of 0.1 angstrom for the dimerization constant, the results depend strongly on the chain length. The ansatz for the potential due to σ-electrons is reformulated so that no additional linear terms to avoid chain shrinking are necessary. Second-neighbor resonance integrals of a magnitude suggested by experimental findings are shown to have no influence on soliton dynamics.

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页码：135 / 150

页数：16

相关论文

共 24 条

[1] NON-LINEAR DYNAMICS, BREATHERS AND PHOTOINDUCED ABSORPTION IN POLYACETYLENE [J].

BISHOP, AR ;

CAMPBELL, DK ;

LOMDAHL, PS ;

HOROVITZ, B ;

PHILLPOT, SR .

SYNTHETIC METALS, 1984, 9 (02) :223-239

[2] BREATHERS AND PHOTOINDUCED ABSORPTION IN POLYACETYLENE [J].

BISHOP, AR ;

CAMPBELL, DK ;

LOMDAHL, PS ;

HOROVITZ, B ;

PHILLPOT, SR .

PHYSICAL REVIEW LETTERS, 1984, 52 (08) :671-674

[3] TRANSPOLYACETYLENE WITHIN THE EXTENDED TIGHT-BINDING PICTURE AND EVIDENCE FOR NEXT-NEAREST NEIGHBOR HOPPING FROM THE DISPERSION OF INTERBAND TRANSITION EDGES [J].

DRECHSLER, SL ;

HEINER, E ;

OSIPOV, VA .

SOLID STATE COMMUNICATIONS, 1986, 60 (05) :415-418

[4] STRUCTURAL DETERMINATION OF THE SYMMETRY-BREAKING PARAMETER IN TRANS-(CH)X [J].

FINCHER, CR ;

CHEN, CE ;

HEEGER, AJ ;

MACDIARMID, AG ;

HASTINGS, JB .

PHYSICAL REVIEW LETTERS, 1982, 48 (02) :100-104

[5] SOLITON TRAPPING AND REPULSION DUE TO A CO-GROUP IN TRANSPOLYACETYLENE [J].

FORNER, W ;

SEEL, M ;

LADIK, J .

SOLID STATE COMMUNICATIONS, 1986, 57 (06) :463-466

[6] ANALYTICAL ENERGY GRADIENTS FOR DYNAMIC SIMULATIONS OF TRANS POLYACETYLENE CHAINS WITHIN THE PARISER-PARR-POPLE HAMILTONIAN [J].

FORNER, W .

SOLID STATE COMMUNICATIONS, 1987, 63 (10) :941-944

[7] SOLITON DYNAMICS IN TRANS-POLYACETYLENE USING THE FULL PARISER-PARR-POPLE HAMILTONIAN [J].

FORNER, W ;

WANG, CL ;

MARTINO, F ;

LADIK, J .

PHYSICAL REVIEW B, 1988, 37 (09) :4567-4576

[8]

FORNER W, 1986, J CHEM PHYS, V84, P5910, DOI 10.1063/1.449903

[9] INFLUENCE OF RANDOMLY FLUCTUATING FORCES AND ENERGY-DISSIPATION ON SOLITON DYNAMICS IN TRANSPOLYACETYLENE [J].

GODZIK, A ;

SEEL, M ;

FORNER, W ;

LADIK, J .

SOLID STATE COMMUNICATIONS, 1986, 60 (07) :609-612

[10] DYNAMICS OF POLYACETYLENE CHAINS [J].

GUINEA, F .

PHYSICAL REVIEW B, 1984, 30 (04) :1884-1890