Summary
International Symposium on Nonlinear Theory and its Applications
2017
Session Number:C0L-A
Session:
Number:C0L-A-1
Supersonic N-Crowdions in 2D Morse Lattice
Sergey Dmitriev, Nikolay Medvedev, Elena Korznikova, Alexander Chetverikov, Manuel Velarde,
pp.554-557
Publication Date:2017/12/4
Online ISSN:2188-5079
Summary:
Crowdion is a point defect in metals in the form of an interstitial atom in a close-packed atomic row. When moving, crowdion transports one atom. In this work the condition of self-focusing collisions in a chain of rigid balls [1] is transformed into the condition for deformable atoms. According to this condition, collision velocity must not exceed the value when the minimal distance between atom centers during collision does not become less than a half of the equilibrium atomic radius in the crystal. One can increase initial energy of crowdion by giving initial velocity to n neighboring atoms in the row not exceeding the critical defocusing value. It is demonstrated that n-crowdions are much more efficient in mass transfer in 2D and 3D Morse crystals.