Journal
PHYSICAL REVIEW LETTERS
Volume 125, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.166402
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Funding
- Austrian Science Fund (FWF) [I 2794-N35, SFB ViCoM F41]
- National Research Foundation (NRF) Korea [2018R1D1A1A02086051]
- MIUR PRIN 2015 [2015C5SEJJ001]
- MIUR PRIN 2017 CENTRAL [20172H2SC4_004]
- DFG through the Wurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter-ct.qmat [EXC 2147, 390858490]
- DFG [258499086-SFB 1170]
- National Research Foundation of Korea [2018R1D1A1A02086051] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We clarify the origin of the strikingly different spectroscopic properties of the chemically similar compounds NaOsO3 and LiOsO3. Our first-principle, many-body analysis demonstrates that the highly sensitive physics of these two materials is controlled by their proximity to an adjacent Hund's-Mott insulating phase. Although 5d oxides are mildly correlated, we show that the cooperative action of intraorbital repulsion and Hund's exchange becomes the dominant physical mechanism in these materials if their t(29) shell is half filled. Small material specific details hence result in an extremely sharp change of the electronic mobility, explaining the surprisingly different properties of the paramagnetic high-temperature phases of the two compounds.
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