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Kinetik der Anordnung der Verunreinigungsatome im Graphen‐Gitter mit der stöchiometrischen Zusammensetzung 1/3 und 1/6
Author(s) -
Radchenko T.M.,
Tatarenko V.A.
Publication year - 2013
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201300094
Subject(s) - dopant , stoichiometry , graphene , lattice (music) , relaxation (psychology) , lattice energy , kinetic energy , materials science , chemistry , range (aeronautics) , atmospheric temperature range , chemical physics , crystal structure , thermodynamics , crystallography , nanotechnology , doping , physics , psychology , social psychology , optoelectronics , quantum mechanics , acoustics , composite material
Abstract Possible ordered distributions of carbon (C) and substituting dopant ( A ) atoms over the sites in a graphene‐type lattice are considered for C 2 A ‐ and C 5 A ‐type (super)structures (corresponding to stoichiometries of 1/3 and 1/6, respectively). Relaxation model of atomic long‐range order (LRO) in a graphene‐based lattice is developed, and kinetic curves of the long‐range order parameters are calculated for a wide range of values of temperature and energy parameters. The long‐range order parameters of C 2 A and C 5 A structures, described by three long‐range order parameters, can relax nonmonotonically. It is caused by the ‘competition’ of intra‐ and intersublattice interaction energies: the first ones predominate only at the early relaxation stage opposing the ordering, while the second ones predominate at the later relaxation stage and in the equilibrium contributing to the ordering.