Condensed Matter and Statistical Physics Journal Club
|Date:|| August 11, 2008
|| "The missing memristor found"
|| Argha Banerjee
||"The missing memristor found" by Dmitri B. Strukov, Gregory S. Snider, Duncan R. Stewart and R. Stanley Williams [Nature, Volume 453, Issue 7191, pp. 80-83 (2008) ].
" Anyone who ever took an electronics laboratory class will be familiar with the fundamental passive circuit elements: the resistor, the capacitor and the inductor. However, in 1971 Leon Chua reasoned from symmetry arguments that there should be a fourth fundamental element, which he called a memristor (short for memory resistor). Although he showed that such an element has many interesting and valuable circuit properties, until now no one has presented either a useful physical model or an example of a memristor. Here we show, using a simple analytical example, that memristance arises naturally in nanoscale systems in which solid-state electronic and ionic transport are coupled under an external bias voltage. These results serve as the foundation for understanding a wide range of hysteretic current-voltage behaviour observed in many nanoscale electronic devices that involve the motion of charged atomic or molecular species, in particular certain titanium dioxide cross-point switches. "