期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.066406
关键词
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资金
- JSPS
- KAKENHI [19052008, 21340090, 21740242, 22540372]
- Global COE
- MEXT
- Computational Materials Science Initiative (CMSI), Japan
- Grants-in-Aid for Scientific Research [21740242, 21340090, 19052008, 22540372, 24740221, 11J09023] Funding Source: KAKEN
We present a mechanism of resistivity minimum in conduction electron systems coupled with localized moments, which is distinguished from the Kondo effect. Instead of the spin-flip process in the Kondo effect, electrons are elastically scattered by local spin correlations which evolve in a particular way under geometrical frustration as decreasing temperature. This is demonstrated by the cellular dynamical mean-field theory for a spin-ice-type Kondo lattice model on a pyrochlore lattice. Peculiar temperature dependences of the resistivity, specific heat, and magnetic susceptibility in the non-Kondo mechanism are compared with the experimental data in metallic Ir pyrochlore oxides.
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