arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0705.1568cond-mat.mtrl-scicond-mat.mes-hall
收藏

相互作用电子系统四点电导的从头计算公式

Ab-initio formulation of the 4-point conductance of interacting electronic systems

P. Bokes, J. Jung, R. W. Godby

摘要:

我们推导了一般量子结的四点电导的密度响应函数表达式。我们的配方使我们能够表明,具有几何收缩和/或不透明的障碍的相互作用的电子系统的4点电导变得相同的宏观可测量的2点电导。在时间相关的密度泛函理论的制定导致直接识别的功能形式的交换相关内核是重要的电导。我们证明了我们的公式的实际implementationof金属真空金属界面。

英文摘要:

We derive an expression for the 4-point conductance of a general quantum junction in terms of the density response function. Our formulation allows us to show that the 4-point conductance of an interacting electronic system possessing either a geometrical constriction and/or an opaque barrier becomes identical to the macroscopically measurable 2-point conductance. Within time-dependent density-functional theory the formulation leads to a direct identification of the functional form of the exchange-correlation kernel that is important for the conductance. We demonstrate the practical implementationof our formula for a metal-vacuum-metal interface.

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。

↑