Hysteresis exhibited by current-voltage characteristics during field-emission experiments is often considered undesirable in terms of practical applications. However, this is an appealing effect for the purposes of memristive devices. We developed a two-stage model to describe hysteretic characteristics, with a particular focus on the system which includes a cathode made of a single-layered graphene sheet on a substrate. In addition to hysteresis, the current-voltage curves display also an unusual self-crossing behavior. The presented memristive model can be used for quantitative descriptions of different hysteretic characteristics such as abrupt changes and self-crossings and for understanding (and modeling) the processes associated with field emission from plane graphene emitters.
@article{arxiv.2010.14138,
title = {A memristive model for graphene emitters: hysteresis and self-crossing},
author = {D. V. Gorodetskiy and S. N. Shevchenko and A. V. Gusel'nikov and A. V. Okotrub},
journal= {arXiv preprint arXiv:2010.14138},
year = {2020}
}