Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Memristor Compact Model with Oxygen-Vacancy Concentration as State
  Variable   We present a unique compact model for oxide memristors, based upon the
concentration of oxygen vacancies as state variables. In this model, the
increase (decrease) in oxygen vacancy concentration is similar in effect to the
reduction (expansion) of the tunnel gap used as a state variable in existing
compact models, providing a mechanism for the electronic current to increase
(decrease) based upon the polarity of the applied voltage. Rate equations
defining the dynamics of state variables are obtained from simplifications of a
recent manuscript in which electronic processes (i.e., electron
capture/emission) were combined with atomic processes (i.e., Frenkel pair
generation/recombination, diffusion) stemming from the thermochemical model of
dielectric breakdown. Central to the proposed model is the effect of the
electron occupancy of oxygen vacancy traps on resistive switching dynamics. The
electronic current is calculated considering Ohmic, band-to-band, and
bound-to-band contributions. The model includes uniform self-heating with
Joule-heating and conductive loss terms. The model is calibrated using
experimental current-voltage characteristics for HfO2 memristors with different
electrode materials. Though a general model is presented, a delta-shaped
density of states profile for oxygen vacancies is found capable of accurately
representing experimental data while providing a minimal description of bound
to band transitions. The model is implemented in Verilog-A and tested using
read/write operations in a 4x4 1T1R nonvolatile memory array to evaluate its
ability to perform circuit simulations of practical interest. A particular
benefit is that the model does not make strong assumptions regarding filament
geometry of which scant experimental-evidence exists to support.

29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin