  Implication logic gates that are based on volatile memristors are
demonstrated experimentally with the use of relay-based volatile memristor
emulators of an original design. The fabricated logic circuit involves two
volatile memristors and it is capable of performing four fundamental logic
functions (two types of material implication and the negations thereof).
Moreover, current-voltage characteristics of individual emulators are recorded
and self-sustained oscillations in a resistor-volatile memristor circuit are
found. The developed emulator offers a great potential for memristive circuit
experiments because of its simplicity, similarity of response with volatile
memristors, and low cost. Our findings, which are based on emulators, can
easily be reproduced with physical volatile memristors and, thus, open up
possibilities for emerging in-memory computing architectures.
