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1. Electronic stabilization by occupational disorder in the ternary bismuthide Li _3–x–y In _x Bi ( x  ≃ 0.14, y  ≃ 0.29)

   https://doi.org/10.1107/S2053229620006439  

   Ovchinnikov, Alexander; Bobev, Svilen (June 2020, Acta Crystallographica Section C Structural Chemistry)

   null (Ed.)

   A ternary derivative of Li 3 Bi with the composition Li 3– x – y In x Bi ( x  ≃ 0.14, y  ≃ 0.29) was produced by a mixed In+Bi flux approach. The crystal structure adopts the space group Fd \overline{3} m (No. 227), with a = 13.337 (4) Å, and can be viewed as a 2 × 2 × 2 superstructure of the parent Li 3 Bi phase, resulting from a partial ordering of Li and In in the tetrahedral voids of the Bi fcc packing. In addition to the Li/In substitutional disorder, partial occupation of some Li sites is observed. The Li deficiency develops to reduce the total electron count in the system, counteracting thereby the electron doping introduced by the In substitution. First-principles calculations confirm the electronic rationale of the observed disorder. 

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2. Precision Control of Amphoteric Doping in Cu _x Bi ₂ Se ₃ Nanoplates

   https://doi.org/10.1021/prechem.4c00046  

   Ren, Huaying; Zhou, Jingxuan; Zhang, Ao; Wu, Zixi; Cai, Jin; Fu, Xiaoyang; Zhou, Jingyuan; Wan, Zhong; Zhou, Boxuan; Huang, Yu; et al (August 2024, Precision Chemistry)
3. Metastability and Photoelectrochemical Properties of Cu ₂ SnO ₃ and Cu _2–x Li _x TiO ₃ : Two Cu(I)-Based Oxides with Delafossite Structures

   https://doi.org/10.1021/acs.chemmater.2c03563  

   O’Donnell, Shaun; Kremer, Reinhard K.; Maggard, Paul A. (February 2023, Chemistry of Materials)
4. Electrochemical control over stoichiometry via cation intercalation into Chevrel-phase sulphides (Cu _x Mo ₆ S ₈ , x = 1–3)

   https://doi.org/10.1039/d3ta07333e  

   Ritter, Kabian A; Mason, Konstantina G; Yew, Suxuen; Perryman, Joseph T; Ortiz-Rodríguez, Jessica C; Singstock, Nicholas R; Wuille_Bille, Brian A; Musgrave, Charles B; Velázquez, Jesús M (March 2024, Journal of Materials Chemistry A)

   This work presents a systematic investigation of the electrochemical intercalation of aqueous copper cations into the Chevrel phase (CP) Mo₆S₈and its effect on the host's electronic and structural characteristics as a function of stoichiometry. 

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5. Strengthened relaxor behavior in (1− x )Pb(Fe _0.5 Nb _0.5 )O ₃ – x BiFeO ₃

   https://doi.org/10.1039/C9TC05883D  

   Prah, Uroš; Dragomir, Mirela; Rojac, Tadej; Benčan, Andreja; Broughton, Rachel; Chung, Ching-Chang; Jones, Jacob L.; Sherbondy, Rachel; Brennecka, Geoff; Uršič, Hana (March 2020, Journal of Materials Chemistry C)

   null (Ed.)

   A systematic study of (1− x )Pb(Fe 0.5 Nb 0.5 )O 3 – x BiFeO 3 ( x = 0–0.5) was performed by combining dielectric and electromechanical measurements with structural and microstructural characterization in order to investigate the strengthening of the relaxor properties when adding BiFeO 3 into Pb(Fe 0.5 Nb 0.5 )O 3 and forming a solid solution. Pb(Fe 0.5 Nb 0.5 )O 3 crystalizes in monoclinic symmetry exhibiting ferroelectric-like polarization versus electric field ( P–E ) hysteresis loop and sub-micron-sized ferroelectric domains. Adding BiFeO 3 to Pb(Fe 0.5 Nb 0.5 )O 3 favors a pseudocubic phase and a gradual strengthening of the relaxor behavior of the prepared ceramics. This is indicated by a broadening of the peak in temperature-dependent permittivity, narrowing of P–E hysteresis loops and decreasing size of ferroelectric domains resulting in polar nanodomains for x = 0.20 composition. The relaxor behavior was additionally confirmed by Vogel–Fulcher analysis. For the x ≥ 0.30 compositions, broad high-temperature anomalies are observed in dielectric permittivity versus temperature measurements in addition to the frequency-dispersive peak located close to room temperature. These samples also exhibit pinched P–E hysteresis loops. The observed pinching is most probably related to the reorganization of polar nanoregions under the electric field as shown by synchrotron X-ray diffraction measurements as well as by piezo-response force microscopy analysis, while in part affected by the presence of charged point defects and anti-ferroelectric order, as indicated from rapid cooling experiments and high-resolution transmission electron microscopy, respectively. 

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