Electronic structures and Aharonov–Bohm effect in higher-order topological Dirac Semimetal nanoribbons with strong confinements

Abstract Electronic structures and magnetotransport properties of topological Dirac semimetal (TDSM) nanoribbons are studied by adopting the tight-binding lattice model Landauer–Büttiker formula based on non-equilibrium Green’s function. For concreteness, TDSM material Cd 3 As 2 grown along experimentally accessible [110] crystallographic direction is taken as an example. We found that electronic nanoribbon depend both strength magnetic field (MF). The transversal local charge density (LCD) distribution states in moved gradually from center toward hinge each surface a [010] MF increased, forming two-sided states. However, one-sided generated when [001] applied. result, can be achieved once tilted placed to nanoribbon. underlying physical mechanism desired attributed orbital Zeeman effects MF, which given analytical analyses. In addition, typical Aharonov–Bohm interference patterns observed conductance two-terminal with MF. This behaviour originates unique interfering loop shaped These findings may not only further our understanding external-field-induced higher-order (HO) phases but also provide alternative method probe HO boundary