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Study of electronic properties, magnetization and persistent currents in a mesoscopic ring by controlled curvature
Physica E: Low-dimensional Systems and Nanostructures ( IF 2.9 ) Pub Date : 2021-04-10 , DOI: 10.1016/j.physe.2021.114760
Luís Fernando C. Pereira , Fabiano M. Andrade , Cleverson Filgueiras , Edilberto O. Silva

We study the model of a noninteracting spinless electron gas confined to the two-dimensional localized surface of a cone in the presence of external magnetic fields. The localized region is characterized by an annular radial potential. We write the Schrödinger equation and use the thin-layer quantization procedure to calculate the wavefunctions and the energy spectrum. In such a procedure, it arises a geometry induced potential, which depends on both the mean and the Gaussian curvatures. Nevertheless, since we consider a ring with a mesoscopic size, the effects of the Gaussian curvature on the energy spectrum are negligible. The magnetization and the persistent current are analyzed. In the former, we observed the Aharonov-Bohm (AB) and de Haas-van Alphen (dHvA) types oscillations. In the latter, it is observed only the AB type oscillations. In both cases, the curvature increases the amplitude of the oscillations.



中文翻译:

通过控制曲率研究介观环中的电子性质,磁化和持久电流

我们研究了在存在外部磁场的情况下,局限于锥的二维局部表面的非相互作用的无旋转电子气体的模型。局部区域的特征在于环形的径向电势。我们编写薛定ding方程,并使用薄层量化程序来计算波函数和能谱。在这种过程中,产生了几何感应电势,该电势既取决于均值曲率,也取决于高斯曲率。然而,由于我们考虑了具有介观尺寸的环,因此高斯曲率对能谱的影响可以忽略不计。分析了磁化强度和持续电流。在前者中,我们观察到了Aharonov-Bohm(AB)和de Haas-van Alphen(dHvA)类型的振荡。在后者中,仅观察到AB型振荡。

更新日期:2021-04-20
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