Ambipolar transition voltage spectroscopy: Analytical results and experimental agreement
Ambipolar transition voltage spectroscopy: Analytical results and experimental agreement
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DOI：
10.1103/physrevb.85.035442
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发表时间：
2012-01-25
影响因子：
3.7
通讯作者：
Baldea, Ioan
中科院分区：
文献类型：
--
作者：
Baldea, Ioan
这项工作强调，应该使用两个偏置极性（V大于或小于0）的过渡电压V-t +/-来正确确定最接近电极费米能级的分子轨道的能量偏移epsilon(0)和分子结中的偏置不对称gamma。我们推导出精确的解析公式，仅用V-t +/-来估计ε(0)和γ。通过展示Beebe等人测量的完整的实验I-V曲线，这些估计得到了实验的验证。[中国生物医学工程学报，1997,01 - 01(2006)]。理论物理。leet . 96, 013110(2010)]对于两个偏置极性都可以很好地再现。
This work emphasizes that the transition voltages V-t +/- for both bias polarities (V greater than or less than 0) should be used to properly determine the energy offset epsilon(0) of the molecular orbital closest to electrodes' Fermi level and the bias asymmetry gamma in molecular junctions. Accurate analytical formulas are deduced to estimate epsilon(0) and gamma solely in terms of V-t +/-. These estimates are validated against experiments, by showing that full experimental I-V curves measured by Beebe et al. [Phys. Rev. Lett. 97, 026801 (2006)] and Tan et al. [Appl. Phys. Lett. 96, 013110 (2010)] for both bias polarities can be excellently reproduced.