Observation of high Tc one dimensional superconductivity in 4 angstrom carbon nanotube arrays

Observation of high Tc one dimensional superconductivity in 4 angstrom carbon nanotube arrays
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4埃碳纳米管阵列高温一维超导性的观测

DOI:
10.1063/1.4976847
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发表时间:
2017
期刊:
影响因子:
1.6
通讯作者:
P. Sheng
P. Sheng
中科院分区:
材料科学4区
文献类型:
--
作者:
Bing;Yang Liu;Qihong Chen;Z. Lai;P. Sheng

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制备大的、均匀的4-A单壁碳纳米管(SWNT)阵列的唯一已知方法是使用沸石晶体作为模板,其中纳米管通过化学气相沉积在AlPO 4 -5(简称AFI)沸石的线性通道内形成。然而,到目前为止,孔填充因子已经非常低,如热重分析(TGA)测量中碳的重量百分比所证明的。在这项工作中,我们表明,通过使用一种新的微片晶AFI晶体作为模板,结合使用一种新的CVD工艺,我们可以将TGA结果提高到22.5wt%,这意味着孔填充因子为91%。我们已经观察到一维(1D)超导在这样的样品。电阻随温度的变化在60 K以下呈现出平滑的下降趋势,微分电阻在一维超导起始温度以上呈现出消失的缺口。所观察到的行为是同意非常好的理论预测…
The only known approach to fabricate large, uniform arrays of 4-A single wall carbon nanotubes (SWNTs) is by using zeolite crystals as the template, in which the nanotubes are formed by chemical vapor deposition inside the linear channels of the AlPO4-5 (AFI for short) zeolite. However, up to now the pore filling factor has been very low, as evidenced by the weight percentage of carbon in thermal gravimetric analysis (TGA) measurements. In this work, we show that by using a new, micro-platelet AFI crystals as the template, combined with the use of a new CVD process, we can increase the TGA result to 22.5wt%, which translates to a pore filling factor of 91%. We have observed one dimensional (1D) superconductivity in such samples. The temperature dependence of resistance shows a smooth decreasing trend below 60 K, and the differential resistance displays a gap that disappears above the 1D superconducting initiation temperature. The observed behaviour is shown to agree very well with the theoretical predicti...
DOI: 10.1038/354056a0
发表时间: 1991-11-07
期刊: NATURE
影响因子: 64.8
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