What is it about?
Single-layer SrTiO3 is very soft and easy to be affected by the external strains, we show that the monolayer SrTiO3 can be tuned from the semiconductor into metallic phases via the in-plane strain engineering. And the metallic phase will drop back into the semiconductor phase when an out-of-plane compressive strain is added.
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Photo by Bruno Wolff on Unsplash
Why is it important?
One always take into consideration the in-plane strains in the past, since it's easy and common in general situations. However, our findings show that the monolayer SrTiO3 not only can be tuned from the semiconductor into metallic phases via the in-plane strain engineering, but also the metallic phase will drop back into the semiconductor phase when an out-of-plane compressive strain is added.
Perspectives
Materials undergoes a semiconductor-metallic phase transition with in-plane strain and metallic-semiconductor phase transition with out-of-plane strain is very unusual. Regardless of its potential application in electronic devices, this phenomenon itself is very interesting. Think about it, we can switch something by pressing it in any direction, just like magic.
chao yang
Jishou University
Read the Original
This page is a summary of: 3D-strain-induced multiple semiconductor–metallic phase transition in monolayer SrTiO3, Applied Physics Letters, January 2023, American Institute of Physics,
DOI: 10.1063/5.0133117.
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