Researchers have successfully synthesized two new metallic layered oxide compounds [BinOn+d]-[RhO2] (n = 2, 3) by pulsed laser deposition and subsequent annealing, and revealed dimensionality-dependent electrical transport behavior. This achievement paves the way for further exploration of novel layered oxide compounds.
Layered oxides have been intensively studied due to their high degree of freedom in designing various electromagnetic properties and functionalities. While Bi-based layered supercell (LSC) compounds [BinOn+d]-[MO2] (M = Mn, Mn/Al, Mn/Fe, or Mn/Ni; n = 2, 3) are a group of prospective candidates, all of the reported compounds are insulators. Here, we report on the synthesis of two novel metallic LSC compounds [BinOn+d]-[RhO2] (n = 2, 3) by pulsed laser deposition and subsequent annealing. With tuning the thickness of the sublattice from Bi2O2+d to Bi3O3+d, a dimensionality-dependent electrical transport is revealed from a conventional metallic transport in n = 2 to a localized transport in n = 3. Our successful growth will be an important step for further exploring novel layered oxide compounds.
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