title: Mobility of a 5|7 defect in carbon nanotubes.
abstract: The movement of a 5|7 defect in the plastic deformations of a carbon nanotube (CNT) plays the role of dislocation glide in the plastic deformations of metals. This work is concerned with the atomic shift mechanism of the 5|7 defect and the energy barrier when the CNT is subjected to tensile loading. Action-derived molecular dynamics (ADMD) is applied to find the minimum energy path and the energy barrier. It is found that the tensile loads make it easy for the 5|7 defect to glide, and lower the energy barrier. The minimum load level that makes a 5|7 defect glide freely with no energy barrier in the presence of an adatom is obtained.
authors.affiliation: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Science Town, Daejeon, 305-701, Republic of Korea.
authors.forename: Youngmin
authors.initials: Y
authors.lastname: Lee
authors.forename: Jihoon
authors.initials: J
authors.lastname: Han
authors.forename: In-Ho
authors.initials: IH
authors.lastname: Lee
authors.forename: Seyoung
authors.initials: S
authors.lastname: Im