空心纳米球耦合到基底的热力学性质研究

Study on Thermodynamic Properties in a Hollow Nanosphere Mechanically Coupled to a Substrate

应用弹性波理论研究不同的空心S i纳米球弱耦合到半无限长的基底上在微扰近似下的振动态密度,结果发现在低频下耦合空心球的振动模有明显的展宽和改变。通过求解声子传播函数的Dyson方程得到空心球的振动态密度,并进一步研究了空心球的热力学性质。

With the help of the elastic wave theory,in the perturbed approximation the density of states for vibrational modes were studied for different hollow Si nanosphere,coupled with a semi-infinite substrate.It was found that the modes of such coupled hollow nanosphere were significantly broadened and shifted toward low frequencies.The vibrational density of states in the hollow nanosphere was obtained by solving the Dyson equation for the phonon propagator,then studied its thermodynamic properties.