ISSN 0869-6632 (Online)
ISSN 2542-1905 (Print)

потенциал Пайерлса–Набарро

Kink dynamics in the discrete klein–gordon model with asymmetric potential in the presence of ac driving

A discrete Klein­Gordon model with asymmetric potential that supports kinks free of the Peierls­Nabarro potential (PNp) is constructed. Ratchet of kink under harmonic AC driving force is investigated in this model numerically and contrasted with the kink ratchet in the conventional discrete model where kinks experience the PNp. We show that the PNp­free kinks exhibit ratchet dynamics very much different from that reported for the conventional lattice kinks which experience PNp.