Non-magnetic element substitution effect in Kondo insulator YbB12 and exotic surface effect in this alloy system
Non-magnetic element substitution effect in Kondo insulator YbB12 and exotic surface effect in this alloy system
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DOI：
10.1063/1.5045793
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发表时间：
2018-10
期刊：
影响因子：
1.6
通讯作者：
F. Iga;K. Yokomichi;Wataru Matsuhra;Hiroyuki Nakayama;A. Kondo;K. Kindo;H. Yoshizawa
中科院分区：
文献类型：
--
作者：
F. Iga;K. Yokomichi;Wataru Matsuhra;Hiroyuki Nakayama;A. Kondo;K. Kindo;H. Yoshizawa
对于近藤绝缘体合金Yb₁₋ₓRₓB₁₂（R = Y、Lu、Sc和Zr），近藤温度Tₖ随着x的每次增加都显示出剧烈变化。通过对所有这些合金的磁化率χ(T)进行分析发现，处于虚拟无隙态的YbB₁₂在磁化率χ(T)中大约25 K处会有一个峰值。在χ(T)中20 K以下出现的向上转折随着能隙ΔE的增大而增强。这些行为可能与在呈现金属行为的能隙内态中的第二能隙的发展有关。对于近藤绝缘体合金Yb₁₋ₓRₓB₁₂（R = Y、Lu、Sc和Zr），近藤温度Tₖ随着x的每次增加都显示出剧烈变化。通过对所有这些合金的磁化率χ(T)进行分析发现，处于虚拟无隙态的YbB₁₂在磁化率χ(T)中大约25 K处会有一个峰值。在χ(T)中20 K以下出现的向上转折随着能隙ΔE的增大而增强。这些行为可能与在呈现金属行为的能隙内态中的第二能隙的发展有关。
Kondo temperature TK’s for Kondo insulator alloys Yb1-xRxB12 (R = Y, Lu, Sc and Zr) show drastic variation as every x increase. It is found that YbB12 in a virtual gap-less state would have a peak at about 25 K in magnetic susceptibility χ(T) from analysis of χ(T) of all these alloys. Up-turns shown in χ(T) below 20 K grow as development of an energy gap ΔE. Those behaviors may be related to the second-gap development within the in-gap state showing metallic behaviors.Kondo temperature TK’s for Kondo insulator alloys Yb1-xRxB12 (R = Y, Lu, Sc and Zr) show drastic variation as every x increase. It is found that YbB12 in a virtual gap-less state would have a peak at about 25 K in magnetic susceptibility χ(T) from analysis of χ(T) of all these alloys. Up-turns shown in χ(T) below 20 K grow as development of an energy gap ΔE. Those behaviors may be related to the second-gap development within the in-gap state showing metallic behaviors.