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arXiv 1007.2935cond-mat.mes-hall
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满足介观圆柱体中持续电流实验观测的途径:平均场研究

On the way to meet the experimental observation of persistent current in a mesoscopic cylinder: A mean field study

Santanu K. Maiti

摘要:

利用Hartree-Fock平均场方法研究了Aharonov-Bohm磁通$ϕ$穿过的介观圆柱中持续电流的行为。我们研究了第二近邻跳跃积分和Hubbard关联对无序存在下持续电流增强的综合作用。与传统的最近邻跳跃模型相比,观察到电流幅度的显着变化,并且电流幅度变得与实验实现相当。我们的分析显示出几个有趣的结果,到目前为止仍然没有解决。

英文摘要:

The behavior of persistent current in a mesoscopic cylinder threaded by an Aharonov-Bohm flux $ϕ$ is carefully investigated within a Hartree-Fock mean field approach. We examine the combined effect of second-neighbor hopping integral and Hubbard correlation on the enhancement of persistent current in presence of disorder. A significant change in current amplitude is observed compared to the traditional nearest-neighbor hopping model and the current amplitude becomes quite comparable to experimental realizations. Our analysis is found to exhibit several interesting results which have so far remained unaddressed.

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。

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