Metal-insulator transition and itinerant antiferromagnetism in NiS2-xSex pyrite
Metal-insulator transition and itinerant antiferromagnetism in NiS2-xSex pyrite
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DOI：
10.1143/jpsj.69.3166
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发表时间：
2000-10-01
影响因子：
1.7
通讯作者：
Cava, RJ
中科院分区：
文献类型：
--
作者：
Miyasaka, S;Takagi, H;Cava, RJ
研究了黄铁矿型NiS_（2-x）Sex中带宽控制的金属-绝缘体（MI）相变。结果表明，从金属侧到MI转变的途径受到紧邻MI相边界的反铁磁金属（AFM）相（0.4 < x < 1.0）的存在的深刻影响。在顺磁金属（PM）相（1.0 < x小于或等于2.0）中，该方法的简单特征在于质量增强。然而，在AFM阶段，该方法是由接近绝缘阶段的载流子密度的显着降低所驱动的。
The bandwidth-controlled metal-insulator (MI) transition in pyrite-type NiS2-xSex has been investigated. The results indicate that the approach to the MI transition from the metallic side is profoundly affected by the presence of the antiferromagnetic metal (AFM) phase (0.4 < x < 1.0) immediately next to the MI phase boundary. In the paramagnetic metal (PM) phase (1.0 < x less than or equal to 2.0), the approach is simply characterized by mass enhancement. In the AFM phase, however, the approach is driven by a marked decrease in the carrier density on approaching the insulating phase.