Impact of iso-structural template layer on stabilizing pyrochlore Bi$_2$Rh$_2$O$_7$

M. Ohno; T. C. Fujita; M. Kawasaki

doi:10.1063/5.0151959

Impact of iso-structural template layer on stabilizing pyrochlore Bi$_2$Rh$_2$O$_7$

Materials Science 2023-07-05 v1 Strongly Correlated Electrons

Authors: M. Ohno , T. C. Fujita , M. Kawasaki

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Abstract

We present an epitaxial stabilization of pyrochlore Bi $_2$ Rh $_2$ O $_7$ on Y-stabilized ZrO $_2$ (YSZ) (111) substrate by inserting a pyrochlore Eu $_2$ Ti $_2$ O $_7$ template layer, otherwise Bi-based layered structures being formed directly on YSZ (111) substrate. This result reveals that "iso-structural crystal phase" plays an important role in the interfacial phase control. The Bi $_2$ Rh $_2$ O $_7$ film exhibits $p$ -type electrical conduction with the lowest longitudinal resistivity ( $\rho_\mathrm{xx}$ ) among the reported Rh pyrochlore oxides. Such parameters as $\rho_\mathrm{xx}$ , carrier density, and mobility show almost no temperature dependence in the measured range of 2 $-$ 300 K, indicating Bi $_2$ Rh $_2$ O $_7$ as one of the rare examples of conducting pyrochlore oxides.

Keywords

pyrochlore epitaxial stabilization template layer bi2rh2o7 interfacial phase control electrical conduction

Cite

@article{arxiv.2303.17136,
  title  = {Impact of iso-structural template layer on stabilizing pyrochlore Bi$_2$Rh$_2$O$_7$},
  author = {M. Ohno and T. C. Fujita and M. Kawasaki},
  journal= {arXiv preprint arXiv:2303.17136},
  year   = {2023}
}

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