arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.08372quant-phcond-mat.mes-hall
收藏

理想Aharonov-Bohm环和柱中的相对论持续电流

Relativistic persistent currents in ideal Aharonov-Bohm rings and cylinders

Ion I. Cotaescu

摘要:

本文利用费米子在理想Aharonov-Bohm(AB)环和柱中运动的完全(1+3)维Dirac方程的精确解,导出了相对论性分流的精确表达式。结果表明,这些电流可以与相对于通量参数的费米子能量的导数,就像在非相对论的情况下。然而,一个新的和显着的相对论效应是饱和的分电流的高值的总角动量。基于这一性质,计算了圆环和圆柱在$T=0$上的相对论持续电流,得到了近似的简单闭合公式。

英文摘要:

The exact solutions of the complete (1+3)-dimensional Dirac equation of fermions moving in ideal Aharonov-Bohm (AB) rings and cylinders are used for deriving the exact expressions of the relativistic partial currents. It is shown that these currents can be related to the derivative of the fermion energy with respect to the flux parameter, just as in the non-relativistic case. However, a new and remarkable relativistic effect is the saturation of the partial currents for high values of the total angular momentum. Based on this property, the total relativistic persistent currents at $T=0$ is evaluated for rings and cylinders obtaining approximative simple closed formulas.

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。

↑