Formation of Single Cu Atomic Chain in Nitrogen Atmosphere
Formation of Single Cu Atomic Chain in Nitrogen Atmosphere
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DOI：
10.1021/jp510916h
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发表时间：
2015-01
影响因子：
3.7
通讯作者：
S. Kaneko;Y. Nakamura;Jinjiang Zhang;Xiongbo Yang;Jian-wei Zhao;M. Kiguchi
中科院分区：
文献类型：
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作者：
S. Kaneko;Y. Nakamura;Jinjiang Zhang;Xiongbo Yang;Jian-wei Zhao;M. Kiguchi
通过实验测量和理论计算相结合的方法，研究了N2气氛下铜原子结的电导和几何结构。低温下机械可控的断裂结测量表明，N2分子稳定了Cu原子结，并降低了其电导值。对铜原子结的长度分析表明，它被拉长了几个原子的长度，虽然它不是没有分子的拉长。通过改变两铜电极之间的间距，计算了几种模型的电导和总能量，研究了铜原子结的几何结构。通过实验和理论相结合的研究，我们发现Cu线性原子链是在N2分子的支撑下形成的，N2分子附着在Cu线性原子链上。并解释了吸附的N2分子降低了Cu原子结的表面能或N2分子直接支持了Cu原子结的形成。
We study the conductance and geometry of the Cu atomic junction in the presence of N2, through combination of experimental measurement and theoretical calculation. A mechanically controllable break-junction measurement at low temperature reveals N2 molecules stabilize a Cu atomic junction, and reduce its conductance value. The length analysis about the Cu atomic junction indicates that it is elongated with the length of a few atoms, although it is not elongated without molecules. We investigate Cu atomic junction’s geometry by calculating the conductance and total energies of the several models by changing the separation between two Cu electrodes. Through combination of experimental and theoretical study, we show that the Cu linear atomic chain is formed with the support of N2 molecule, and N2 molecule attached on the Cu linear atomic chain. The formation of Cu linear atomic chain is explained that attached N2 molecules reduce the surface energy of the Cu atomic junction or N2 molecule directly supports t...