ChemInform Abstract: PYROCHLORES. XI. HIGH‐PRESSURE STUDIES OF THE ANTIMONATES A2SB2O7 (A = CALCIUM, STRONTIUM, CADMIUM) AND PREPARATION OF THE WEBERITE STRONTIUM BISMUTHATE SR2BI2O7

Knop, Osvald; Demazeau, G.; Hagenmuller, Paul

doi:10.1002/chin.198108035

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Pb2sb2o71

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2022

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“…Therefore, high-pressure synthesis may be effective in certain cases. For example, Ca 2 Sb 2 O 7 and Cd 2 Sb 2 O 7 form the W-phase under ambient pressure, whereas the P-phase can be synthesized by high-pressure synthesis at 60 ∼ 65 kbar [49]. Controlling other conditions, such as the atmosphere and temperature, may also be effective in obtaining a metastable P-phase.…”

Section: Pb2sb2o7mentioning

confidence: 99%

Flat-Band Ferromagnetism in Pb2Sb2O7 by Self-Doped Mechanism

HASE

Higashi

Eisaki

et al. 2022

Preprint

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Electron systems with strong geometrical frustration have flat bands, and their unusual band dispersion is expected to induce a wide variety of physical properties. However, for such properties to emerge, the Fermi level must be pinned within the flat band. In this study, we performed first-principles calculations on the pyrochlore oxide Pb2Sb2O7 and theoretically clarified that the self-doping mechanism induces pinning of the Fermi level in the flat band in this system. Therefore, a very high density of states is realized at the Fermi level, and the ferromagnetic state becomes the ground state by a flat-band mechanism, even though the system does not contain any magnetic elements. This compound has the potential to become a new platform to project the properties of flat-band systems in the real world.

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Section: Pb2sb2o7mentioning

confidence: 99%