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研究了由鞍形势描述的量子点接触中的电子输运性质,利用Hartree-Fock近似与低维纳米器件中Thomas-Fermi近似方法处理了电子-电子之间的相互作用,采用格点格林函数方法计算了零温下体系的电导、电子的自旋积累以及散粒噪声,重现了0.7结构这个反常的实验现象.计算结果加深了我们关于半导体纳米器件中的强关联互作用对自旋输运影响的理解.
The electron transport properties in quantum dot contacts described by the saddle potential are investigated. The electron-electron interactions are treated using the Hartree-Fock approximation and the Thomas-Fermi approximation in low-dimensional nanostructures. The lattice Green’s function The conductivity, electron spin accumulation and shot noise of the system at zero temperature have been calculated and the anomalous experimental phenomenon of 0.7 structure has been reproduced. The calculation results have deepened our understanding of the effect of strong correlations on spin transport in semiconductor nanodevices Impact understanding.