Low-temperature phase transformation from nanotube to sp<sup>3</sup> superhard carbon phase<xref ref-type="fn" rid="cpb142749fn1">*</xref>

Low-temperature phase transformation from nanotube to sp³ superhard carbon phase*

Xu Ning^a)†, Li Jian-Fu^b), Huang Bo-Long^b), Wang Bao-Lin^a)‡

Properties of the (9, 0) carbon phase at zero pressure: (a) electronic band structure; (b) phonon dispersion curves.