扶手椅形碳纳米管的Peierls相变研究

STUDY ON THE PEIERLS PHASE TRANSITION OF ARMCHAIR CARBON NANOTUBE

根据描述电子 声子相互作用的Fr hlich哈密顿量 ,推导出了扶手椅形碳纳米管 (ABT(n) )的Peierls相变温度的一般表达式 ,并利用该式计算了ABT(8)和ABT(10 )的Peierls相变温度 ,结果表明ABT(n)的Peierls相变温度将随管径的增大而减小 ,并且ABT(n)在远离室温下都不会发生Peierls相变 ,仍然保持其金属性 .

Using a Frhlich Hamiltonian for the electron\|lattice interaction, an expression for the Peierls phase transition temperature ( T \-p) of armchair carbon nanotube (ABT( n )) has been derived.As an illustration, the formula is used to estimate T \-p of ABT(8) and ABT(10). The results indicate that T \-p of ABT( n ) will decrease with increasing of their diameters,and they are stable against the Peierls distortion and preserve metallic property at and far bellow room temperature.