• 作者：Keivan Esfarjani ^A1 ; Yuichi Hashi ^A2 ; Satoshi Itoh ^A3 ; Sigeo Ihara ^A3 ; Yoshiyuki Kawazoe ^A1
• 关键词：PACS ; 36.20.Kd ; 31.20.Gm ; 33.10.Gx
• 刊名：Zeitschrift für Physik D Atoms, Molecules and Clusters
• 出版年：1997
• 出版时间：June 1997
• 年：1997
• 卷：41
• 期：1
• 页码：73-76
• 全文大小：705 KB

Abstract. To study the thermodynamic and mechanical stability of toroidal isomers of $C_{240}$, we use a semi-empirical tight-binding theory and calculate their electronic structure, cohesive energy and vibrational spectra within the harmonic approximation. From these, we deduce their free energy at temperatures up to 1500K. The results are also compared to the isomer with icosahedral symmetry. Finally, we discuss within this approach, their stability and abundance.