Pressure-induced superconductivity in Bi_<0.85>Sb_<0.15> alloy
Pressure-induced superconductivity in Bi_<0.85>Sb_<0.15> alloy
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Bi_<0.85>Sb_<0.15>合金中的压力诱导超导
DOI：
10.1088/1742-6596/400/2/022088
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Yuh Yamada and S. Nakano
中科院分区：
文献类型：
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作者：
A. Ohmura;A. Yamamura;M. Einaga;F. Ishikawa;A. Nakayama;Yuh Yamada and S. Nakano
本文用电阻率和同步辐射X射线衍射方法研究了x= 0.15（Bi 0.85Sb 0.15）铋锑合金的电学和结构性质随压力的变化。在3GPa和室温下，晶体结构从A7结构转变为无公度的主-客体复合结构。电阻率的温度依赖性从半导体行为到与结构相变相关的金属行为发生了很大的变化。在4.5GPa以上观察到Bi0.85Sb0.15的压致超导转变。随着压力的增加，相变温度Tc从4.5GPa时的6.79GPa降低到9.5GPa时的5.82K。
Pressure variation of the electrical and structural properties of bismuth-antimony alloy at the composition of x= 0.15 (Bi 0.85 Sb 0.15) has been studied by electrical resistivity and synchrotron radiation x-ray diffraction measurements up to 10 GPa. The crystal structure changes from the A7 structure to the incommensurate host-guest composite one at 3 GPa and room temperature. Temperature dependence of the resistivity greatly changes from the semiconducting behaviour to the metallic one associated with the structural phase transition. Pressure-induced superconducting transition of Bi 0.85 Sb 0.15 is observed above 4.5 GPa. The transition temperature T c is found to decrease from 6.79 GPa at 4.5 GPa to 5.82 K at 9.5 GPa with increasing pressure.