Coherent electron transport in a helical nanotube
arXiv:1605.03417 · doi:10.1016/j.physe.2016.05.007
Abstract
The quantum dynamics of carriers bound to helical tube surfaces is investigated in a thin-layer quantization scheme. By numerically solving the open-boundary Schrdinger equation in curvilinear coordinates, geometric effect on the coherent transmission spectra is analysed in the case of single propagating mode as well as multimode. It is shown that, the coiling endows the helical nanotube with different transport properties from a bent cylindrical surface. Fano resonance appears as a purely geometric effect in the conductance, the corresponding energy of quasibound state is obviously influenced by the torsion and length of the nanotube. We also find new plateaus in the conductance. The transport of double-degenerate mode in this geometry is reminiscent of the Zeeman coupling between the magnetic field and spin angular momentum in quasi-one-dimensional structure.
arXiv comment11 pages, 9 figures
References in corpus (20)
- Selfconsistent order-N density-functional calculations for very large systems
- High-Field, Quasi-Ballistic Transport in Short Carbon Nanotubes
- Ballistic Transport in Metallic Nanotubes With Reliable Pd Ohmic Contacts
- Quantum transport in carbon nanotubes
- Size Effects in Carbon Nanotubes
- The Effect of Structural Distortions on the Electronic Structure of Carbon Nanotubes
- Geometric potential and transport in photonic topological crystals
- Quantum mechanics of a spin-orbit coupled electron constrained to a space curve
- Visualizing landscapes of the superconducting gap in heterogeneous superconductor thin films: geometric influences on proximity effects
- Effect of Curvature on the Electronic Structure and Bound State Formation in Rolled-up Nanotubes
- Geometry induced charge separation on a helicoidal ribbon
- Coherent electronic transport in a multimode quantum channel with Gaussian-type scatterers
- Quantum particle confined to a thin-layer volume: Non-uniform convergence toward the curved surface
- Strongly anisotropic ballistic magnetoresistance in compact three-dimensional semiconducting nanoarchitectures
- Evanescent channels and scattering in cylindrical nanowire heterostructures
- Quantum Hall-like effect on strips due to geometry
- Curvature-induced bound states and coherent electron transport on the surface of a truncated cone
- Relation between the transmission rates and the wave functions in the carbon nanotube junctions
- Torsion-induced persistent current in a twisted quantum ring
- Effect of quasi-bound states on coherent electron transport in twisted nanowires