期刊
PHYSICAL REVIEW B
卷 85, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.205104
关键词
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资金
- Natural Science and Engineering Research Council of Canada
- Canadian Institute for Advanced Research
- JSPS [21684019]
- MEXT, Japan [19052003]
- Grants-in-Aid for Scientific Research [21684019] Funding Source: KAKEN
We have studied the effect of pressure on the pyrochlore iridate Eu2Ir2O7, which, at ambient pressure, has a thermally driven insulator to metal transition at T-MI similar to 120 K. As a function of pressure, the insulating gap closes, apparently continuously near P similar to 6 GPa. However, rather than T-MI going to zero as expected, the insulating ground state crosses over to a metallic state with a negative temperature coefficient of resistivity, suggesting that these ground states have a novel character. The high-temperature state also crosses over near 6 GPa from an incoherent to a conventional metal, implying that there is a connection between the high- and the low-temperature states,
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