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A new perovskite KOsO3 has been stabilized under high-pressure and high-temperature conditions. It is cubic at 500 K (Pm-3m) and undergoes subsequent phase transitions to tetragonal at 320 K (P4/mmm) and rhombohedral (R-3m) at 230 K as shown from refining synchrotron X-ray powder diffraction (SXRD) data. The larger orbital overlap integral and the extended wavefunction of 5d electrons in the perovskite KOsO3 allow to explore physics from the regime where Mott and Hund’s rule couplings dominate to the state where the multiple interactions are on equal footing. We demonstrate an exotic magnetic ordering phase found by neutron powder diffraction along with physical properties via a suite of measurements including magnetic and transport properties, differential scanning calorimetry, and specific heat, which provide comprehensive information for a system at the crossover from localized to itinerant electronic behavior.

権利情報:

• In Copyright
  

キーワード: KOsO3

刊行年月日: 2024-04-09

出版者: American Physical Society

掲載誌:

• PHYSICAL REVIEW LETTERS (ISSN: 00319007) vol. 132 p. 156701-156701

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1103/PhysRevLett.132.156701

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更新時刻: 2024-04-10 16:30:15 +0900

MDRでの公開時刻: 2024-04-10 16:30:15 +0900