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Published on: May 24, 2020
Electrolyte-gated SmCoO3 thin-film transistors exhibiting thickness-dependent large switching ratio at room
Ping-Hua Xiang1, Shutaro Asanuma, Hiroyuki Yamada
1National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8562, Japan.
Abstract:
A Mott transistor that exhibits a large switching ratio of more than two orders at room temperature is demonstrated by using the electric double layer of an ionic liquid for gating on a strongly correlated electron system SmCoO3. From the thickness dependence of the on-state channel current, we estimate the screening length of the SmCoO3 to be ∼5 nm. The good carrier confinement within the Thomas-Fermi screening length demonstrates that the SmCoO3-channel electric double layer transistor is the first candidate for a two-dimensional Mott transistor.
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