Electronic Conductance of Platinum Atomic Contact in a Nitrogen Atmosphere

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• 作者：Satoshi Kaneko ; Jinjiang Zhang ; Jianwei Zhao ; Manabu Kiguchi
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：May 16, 2013
• 年：2013
• 卷：117
• 期：19
• 页码：9903-9907
• 全文大小：269K
• 年卷期：v.117,no.19(May 16, 2013)
• ISSN：1932-7455

文摘

We have investigated the platinum atomic contact in a nitrogen atmosphere using mechanically controllable break junction technique and theoretical calculation. Conductance, dI/dV measurement, and theoretical calculation revealed a single N₂ molecule placed between platinum electrodes, where the N₂ molecular axis was parallel to the junction axis. The conductance of the single N₂ molecular junction was 1 G₀ (=2e²/h), which was comparable to that of metal atomic contacts indicating the strong interaction between the nitrogen molecule and Pt electrodes. Theoretical calculation supported the high conductivity of the molecular junction and revealed that two dominant channels contributed to the electron transport through the junction. The two dominant channels were from the coupling between orbitals (d_xz and d_yz) of Pt atom and orbitals (p_x and p_y) of N atom.