1 research outputs found
Transport of Polarons in Graphene Nanoribbons
The
field-induced dynamics of polarons in armchair graphene nanoribbons
(GNRs) is theoretically investigated in the framework of a two-dimensional
tight-binding model with lattice relaxation. Our findings show that
the semiconductor behavior, fundamental to polaron transport to take
place, depends upon of a suitable balance between the GNR width and
the electron–phonon (e–ph) coupling strength. In a similar
way, we found that the parameter space for which the polaron is dynamically
stable is limited to an even narrower region of the GNR width and
the e–ph coupling strength. Interestingly, the interplay between
the external electric field and the e–ph coupling plays the
role to define a phase transition from subsonic to supersonic velocities
for polarons in GNRs