Pressure-induced superconductivity in boron-doped Buckypapers
Pressure-induced superconductivity in boron-doped Buckypapers
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DOI：
10.1063/1.3242016
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发表时间：
2009-10
影响因子：
4
通讯作者：
J. Nakamura;M. Matsudaira;J. Haruyama;H. Sugiura;M. Tachibana;J. Reppert;A. Rao;T. Nishio;Y. Hasegawa;H. Sano;Y. Iye
中科院分区：
文献类型：
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作者：
J. Nakamura;M. Matsudaira;J. Haruyama;H. Sugiura;M. Tachibana;J. Reppert;A. Rao;T. Nishio;Y. Hasegawa;H. Sano;Y. Iye
我们展示了纸状薄膜（Buckypaper）的创建，该薄膜由弱管间范德华耦合（IVDWC）状态下的硼掺杂单壁碳纳米管（B-SWNT）伪二维网络组成。它是通过充分溶解生长的 B-SWNT 绳并将其紧密组装在硅基板上而形成的。我们发现，在无压力的情况下，通过向薄膜施加较小的压力，可以将超导转变温度 (Tc) 诱导至 19 K，并且径向呼吸声子的频率随着施加压力而急剧增加。关于 IVDWC 和 B-SWNT 直径分布的讨论表明存在很强的相关性。
We show creation of paperlike thin film (Buckypaper) consisting of pseudo-two-dimensional network of boron-doped single-walled carbon nanotubes (B-SWNTs) within weakly intertube van der Waals coupling (IVDWC) state. It was formed by sufficiently dissolving as-grown ropes of B-SWNTs and densely assembling them on silicon substrate. We find that superconducting transition temperature (Tc) of 8 K under absent pressure can be induced up to 19 K by applying a small pressure to the film and that a frequency in the radial breathing phonon drastically increases with applying pressure. Discussion about IVDWC and distribution of B-SWNTs diameter imply the strong correlation.