浙江师范大学学报(自然科学版)
浙江師範大學學報(自然科學版)
절강사범대학학보(자연과학판)
JOURNAL OF ZHEJIANG NORMAL UNIVERSITY(NATURAL SCIENCES)
2014年
4期
427-432
,共6页
锯齿型边石墨烯纳米带%SSH模型%链间耦合%电子能谱
鋸齒型邊石墨烯納米帶%SSH模型%鏈間耦閤%電子能譜
거치형변석묵희납미대%SSH모형%련간우합%전자능보
graphene nanoribbon with zigzag edge%SSH model%interchain coupling%electronic spectrum
利用SSH( Su-Schrieffer-Heeger)模型研究了2条聚乙炔链键与键平行和非平行结构耦合的电子能谱。两者的电子能谱与耦合强度之间有类似关系,但平行结构受耦合强度的影响更大些。在此基础上,将耦合链模型应用于锯齿型石墨烯纳米带的电子能谱计算,并给出了解析色散关系。同时,还研究了电子能谱与其耦合强度的关系,耦合越强,能带越宽。
利用SSH( Su-Schrieffer-Heeger)模型研究瞭2條聚乙炔鏈鍵與鍵平行和非平行結構耦閤的電子能譜。兩者的電子能譜與耦閤彊度之間有類似關繫,但平行結構受耦閤彊度的影響更大些。在此基礎上,將耦閤鏈模型應用于鋸齒型石墨烯納米帶的電子能譜計算,併給齣瞭解析色散關繫。同時,還研究瞭電子能譜與其耦閤彊度的關繫,耦閤越彊,能帶越寬。
이용SSH( Su-Schrieffer-Heeger)모형연구료2조취을결련건여건평행화비평행결구우합적전자능보。량자적전자능보여우합강도지간유유사관계,단평행결구수우합강도적영향경대사。재차기출상,장우합련모형응용우거치형석묵희납미대적전자능보계산,병급출료해석색산관계。동시,환연구료전자능보여기우합강도적관계,우합월강,능대월관。
The electronic spectrum of two coupled polyacetylene chains with bond-bond parallel and non-paral-lel was studied by using the SSH ( Su-Schrieffer-Heeger) model.Both the spectra were related to the coupling intensity, but the effect of the bond-bond parallel structure on the spectrum was obvious compared to the non-parallel .Based on this model, the electronic spectrum of graphene nanoribbons with zigzag edges was calculat-ed and the energy dispersion relation was derived.The relationship between the spectrum and the coupling in-tensity was also discussed, which showed that the stronger the coupling was the wider the energy band ap-peared.