Tellurium nanowires present potential for room-temperature ferroelectricity and information storage

A discovery by a world workforce of scientists has revealed room-temperature ferroelectric and resistive switching behaviors in single-element tellurium (Te) nanowires, paving the best way for developments in ultrahigh-density information storage and neuromorphic computing.

Printed in Nature Communications, this analysis marks the first experimental proof of ferroelectricity in Te nanowires, a single-element materials, which was beforehand predicted solely in theoretical fashions.

“Ferroelectric supplies are substances that may retailer electrical cost and preserve it even when the ability is turned off, and their cost could be switched by making use of an exterior electrical area—a attribute important for non-volatile reminiscence functions,” factors out co-corresponding creator of the paper Professor Yong P. Chen, a principal investigator at Tohoku College’s Superior Institute for Supplies Analysis (AIMR) and a professor at Purdue and Aarhus Universities.

Whereas ferroelectricity is widespread in compounds, single-element supplies like Te hardly ever exhibit this habits as a result of their symmetric atomic buildings.

Nonetheless, Chen and his colleagues demonstrated that Te nanowires exhibit strong ferroelectric properties at room temperature, because of the distinctive atomic displacement inside their one-dimensional chain construction. The invention was made utilizing piezoresponse power microscopy (PFM) and high-resolution scanning transmission electron microscopy.

Constructing on this discovery, the workforce developed a novel gadget—a self-gated ferroelectric field-effect transistor (SF-FET)—which integrates each ferroelectric and semiconducting properties in a single gadget. The SF-FET demonstrates distinctive information retention, quick switching speeds of lower than 20 nanoseconds, and a formidable storage density exceeding 1.9 terabytes per sq. centimeter.

“Our breakthrough opens up new alternatives for next-generation reminiscence gadgets, the place Te nanowires’ excessive mobility and distinctive digital properties might assist simplify gadget architectures,” says Yaping Qi, an assistant professor at AIMR and co-first creator of the research.

“Our SF-FET gadget might additionally play a vital function in future synthetic intelligence techniques, enabling neuromorphic computing that mimics human mind perform. Moreover, the findings can assist result in decrease energy consumption in digital gadgets, addressing the necessity for sustainable expertise.”

At present, the workforce at AIMR, which contains Qi and Chen, is exploring new 2D, ferroelectric supplies utilizing synthetic intelligence (AI) strategies, in collaboration with Professor Hao Li’s group. This might result in the invention of extra supplies with promising ferroelectric properties or additional functions past reminiscence storage, comparable to neuromorphic computing.