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Single and double valence configuration interactions for recovering the exponential decay law while tunneling through a molecular wire

机译:单价和双价构型相互作用,可在通过分子线隧穿时恢复指数衰减规律。

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The exponential decay of the electronic transmission through a molecular wire with its length is calculated using a configuration interaction elastic scattering quantum chemistry (CI-ESQC) theory [1, 2]. In the HOMO-LUMO gap and in a one-electron approximation, this decay is exponential since the scattering matrix comes from a product of spatial propagators along the wire. In a valence SD-CI (single and double-configurations interaction) description, such a product does not exist. An effective one was numerically obtained from the CI-ESQC scattering matrix. Fluctuations over the effective CI-exponential decay come from the truncation of the full CI basis set and also from many-body exchange-correlation effects along the molecular wire.
机译:使用分子相互作用的电子传输的指数衰减及其长度是使用构型相互作用弹性散射量子化学(CI-ESQC)理论计算的[1,2]。在HOMO-LUMO间隙中并且在单电子近似中,此衰减是指数级的,因为散射矩阵来自沿导线的空间传播子的乘积。在价SD-CI(单配置和双配置交互)描述中,不存在此类产品。从CI-ESQC散射矩阵中数值获得了一个有效值。有效CI指数衰减的波动来自完整CI基础集的截断,也来自沿分子线的多体交换相关效应。

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