| 聚乙炔中双激子和两个单激子的稳态性质 |
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| 引用本文： | 孙书娟,傅 军,姚钟瑜,潘孟美.聚乙炔中双激子和两个单激子的稳态性质[J].河北科技大学学报,2011,32(4):308-312,325. |
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| 作者姓名： | 孙书娟 傅 军 姚钟瑜 潘孟美 |
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| 作者单位： | 海南师范大学物理与电子工程学院,海南海口,571158 |
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| 基金项目： | 海南师范大学青年教师基金资助项目(QN0803) |
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| 摘 要： | 在Su-Schrieffer-Heeger (SSH)模型基础上,计入长程电子关联的影响,研究聚乙炔分子链中双激子态与2个单激子态的稳态性质,比较不同关联强度下激子的晶格位形、能级、电荷密度波、自旋密度波以及吸收谱线.结果表明:零电子关联下分子链中的2个单激子不能稳定存在；激子半径均随着关联强度的增加而减小；与双激子的...
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| 关 键 词： | 双激子 单激子 电子关联 能级 电荷密度波 自旋密度波 |
| 收稿时间： | 2010/11/9 0:00:00 |
| 修稿时间： | 2011/3/13 0:00:00 |
Static nature of biexciton and two single-excitons in polyacetylene |
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| SUN Shu-juan,FU Jun,YAO Zhong-yu and PAN Meng-mei.Static nature of biexciton and two single-excitons in polyacetylene[J].Journal of Hebei University of Science and Technology,2011,32(4):308-312,325. |
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| Authors: | SUN Shu-juan FU Jun YAO Zhong-yu and PAN Meng-mei |
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| Institution: | SUN Shu-juan,FU Jun,YAO Zhong-yu,PAN Meng-mei(College of Physics and Electronic Engineering,Hainan Normal University,Haikou Hainan 571158,China) |
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| Abstract: | Adding a extended Hubbard term to the SSH model for polyacetylene,we carried a self-consistent variation calculation on biexciton and two single-excitons in polyacetylene.The configuration,energy level,charge density wave,spin density wave and absorbance in the two systems are compared.Results show that the two single-excitons can not exist stablely without electronic correlation;radiuses of biexitons and single-excitons decrease as the electronic correlation increases;two single-excitons system has four en... |
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| Keywords: | biexciton exciton electronic correlation energy level charge density wave spin density wave |
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