Thermodynamic and transport properties of SmS under high pressure
Thermodynamic and transport properties of SmS under high pressure
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DOI：
10.1016/j.physb.2009.07.013
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发表时间：
2009-10-15
影响因子：
2.8
通讯作者：
Sato, N. K.
中科院分区：
文献类型：
--
作者：
Imura, K.;Matsubayashi, K.;Sato, N. K.
我们测量了SmS在8.5 kbar下的输运和热力学性质，发现在特征温度T（0）处，电阻率随温度的变化存在凸点结构，热膨胀系数随温度的变化存在Schottky型反常.我们还观察到霍尔常数的绝对值在T（0）以下迅速增加。从这些结果中，我们认为，电阻率的急剧上升低于到是固有的黄金SmS，可以归因于载流子浓度的降低，可能是由于伪间隙的形成。(C)2009爱思唯尔有限公司版权所有。
We measured transport and thermodynamic properties of the valence-fluctuating phase of SmS up to 8.5 kbar, and found a bump structure in the temperature dependence of the electrical resistivity and a Schottky-type anomaly in the temperature dependence of the thermal expansion coefficient at a characteristic temperature T(0). We also observed that the absolute value of the Hall constant rapidly increases below T(0). From these results, we argue that the steep rise of the electrical resistivity below To is inherent to golden SmS and can be ascribed to the decrease in the carrier concentration possibly due to the pseudo gap formation. (C) 2009 Elsevier B.V. All rights reserved.