Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.176403
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Funding
- NSF [DMR 1122603]
- Robert A. Welch Foundation [F-1066]
- KAKENHI [23340101, 252460135]
- JSPS [12F02023]
- National Basic Research Program of China (973 program) [2014CB921500]
- Chinese Academy of Sciences [Y2K5016X51]
- NSF-China [11174339]
- Ministry of Education, Culture, Sports, Science and Technology, Japan [24740220]
- Grants-in-Aid for Scientific Research [12F02023, 24740220, 23340101] Funding Source: KAKEN
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The A-site ordered perovskite (AA(3)')B4O12 can accommodate transition metals on both A' and B sites in the crystal structure. Because of this structural feature, it is possible to have narrow-band electrons interacting with broadband electrons from different sublattices. Here we report a new A-site ordered perovskite (CaCu3)Ir4O12 synthesized under high pressure. The coupling between localized spins on Cu2+ and itinerant electrons from the Ir-O sublattice makes Kondo-like physics take place at a temperature as high as 80 K. Results from the local density approximation calculation have confirmed the relevant band structure. The magnetization anomaly found at 80 K can be well rationalized by the two-fluid model.
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