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arXiv 1004.1079cond-mat.mes-hallcond-mat.quant-gas
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He掺杂单壁碳纳米管束径向热膨胀的量子效应

Quantum effects in the radial thermal expansion of bundles of single-walled carbon nanotubes doped with 4He

A. V. Dolbin, V. B. Esel'son, V. G. Gavrilko, V. G. Manzhelii, S. N. Popov, N. A. Vinnikov, B. Sundqvist, .

摘要:

用热膨胀法研究了2.5-9.5 K温度范围内,饱和~ 4 He杂质(摩尔浓度为9.4%)的单壁碳纳米管束的径向热膨胀(ar)。在2.1-3.7 K(ar)是负的,是几倍高于纯纳米管束的负(ar)。这最有可能指向4 He原子在纳米管束系统中的不同位置之间的隧穿。随着4 He浓度的降低,超膨胀减小。

英文摘要:

The radial thermal expansion (ar) of bundles of single-walled carbon nanotubes saturated with 4He impurities to the molar concentration 9.4% has been investigated in the interval 2.5-9.5 K using the dilatometric method. In the interval 2.1-3.7 K (ar) is negative and is several times higher than the negative (ar) for pure nanotube bundles. This most likely points to 4He atom tunneling between different positions in the nanotube bundle system. The excess expansion was reduced with decreasing 4He concentration.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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