Journal
NATURE
Volume 453, Issue 7191, Pages 80-83Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nature06932
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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)(1). 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(2-19) that involve the motion of charged atomic or molecular species, in particular certain titanium dioxide cross- point switches(20-22).
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