Based on the modified Su-Schrieffer-Heeger Harniltonian and by adding the interchain hopping term,we consider the effect of interchain coupling on quantum lattice fluctuation in trans-polyacetylene.It has been found t...Based on the modified Su-Schrieffer-Heeger Harniltonian and by adding the interchain hopping term,we consider the effect of interchain coupling on quantum lattice fluctuation in trans-polyacetylene.It has been found that the interchain coupling does not always weaken quantum lattice fluctuation.After overcoming a barrier of 1 eV or so,the quantum lattice fluctuation can induce a transition of interchain order.The physical meaning of these features is discussed.展开更多
In order to substantiate the applicability of the Takayama-Lin-Liu-Maki model to conducting polymer,the Su-Schrieffer-Heeger model is generalized to include the effects of lattice zero-point motions on electronic prop...In order to substantiate the applicability of the Takayama-Lin-Liu-Maki model to conducting polymer,the Su-Schrieffer-Heeger model is generalized to include the effects of lattice zero-point motions on electronic properties.Beyond the treatment of the white-noise approximation,some significant electronic properties of Peierls-Fröhlich states are documented.The finding shows that the correlation of lattice motions suppresses the effects of zero-point motions on the electronic properties more seriously.展开更多
基金Supported by the Shanghai Qi-Ming-Xing Plan for Young Scientiststhe National Natural Science Foundation of China under Grant No.19571012.
文摘Based on the modified Su-Schrieffer-Heeger Harniltonian and by adding the interchain hopping term,we consider the effect of interchain coupling on quantum lattice fluctuation in trans-polyacetylene.It has been found that the interchain coupling does not always weaken quantum lattice fluctuation.After overcoming a barrier of 1 eV or so,the quantum lattice fluctuation can induce a transition of interchain order.The physical meaning of these features is discussed.
基金Supported by the Nationeil Natural Science Foundation of China under Grant No.59790050the“863”Program of China。
文摘In order to substantiate the applicability of the Takayama-Lin-Liu-Maki model to conducting polymer,the Su-Schrieffer-Heeger model is generalized to include the effects of lattice zero-point motions on electronic properties.Beyond the treatment of the white-noise approximation,some significant electronic properties of Peierls-Fröhlich states are documented.The finding shows that the correlation of lattice motions suppresses the effects of zero-point motions on the electronic properties more seriously.