Novel supercell compounds of layered Bi-Rh-O with $p$-type metallic conduction materialized as a thin film form

• DOI: 10.48550/arxiv.2302.13538
• Publication Date: 2023-01-01
• Authors: M. Ohno; Takahiro Fujita; Y. Masutake; Hiroshi Kumigashira; M. Kawasaki
• Keywords: Supercell

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 [Bi$_n$O$_{n+\delta}$]-[$M$O$_2$] ($M$ = Mn, Mn/Al, Mn/Fe, or Mn/Ni; $n=2, 3$) are a group prospective candidates, all the reported insulators. Here, we report on synthesis two novel metallic LSC [Bi$_{n}$O$_{n+\delta}$]-[RhO$_2$] ($n=2, by pulsed laser deposition subsequent annealing. With tuning thickness sublattice from Bi$_2$O$_{2+\delta}$ Bi$_3$O$_{3+\delta}$, dimensionality-dependent electrical transport is revealed conventional $n=2$ localized $n=3$. Our successful growth will be an important step for further exploring oxide compounds.