Magnetoresistance oscillations induced by geometry in a two-dimensional quantum ring
- URL: http://arxiv.org/abs/2406.15151v1
- Date: Fri, 21 Jun 2024 13:54:40 GMT
- Title: Magnetoresistance oscillations induced by geometry in a two-dimensional quantum ring
- Authors: Francisco A. G. de Lira, Edilberto O. Silva, Christian D. Santangelo,
- Abstract summary: We consider a GaAs device having an average radius of $800hspace0.05cmtextnm$ in different regimes of subband occupation at non-zero temperature.
We explore how the modified surface affects the Van-Hoove conductance singularities and the magnetoresistance interference patterns resulting from the Aharonov-Bohm oscillations of different frequencies.
- Score: 0.0
- License: http://creativecommons.org/publicdomain/zero/1.0/
- Abstract: In this work, we investigate the effects of a controlled conical geometry on the electric charge transport through a two-dimensional quantum ring weakly coupled to both the emitter and the collector. These mesoscopic systems are known for being able to confine highly mobile electrons in a defined region of matter. Particularly, we consider a GaAs device having an average radius of $800\hspace{0.05cm}\text{nm}$ in different regimes of subband occupation at non-zero temperature and under the influence of a weak and uniform background magnetic field. Using the adapted Landauer formula for the resonant tunneling and the energy eigenvalues, we explore how the modified surface affects the Van-Hoove conductance singularities and the magnetoresistance interference patterns resulting from the Aharonov-Bohm oscillations of different frequencies. Magnetoresistance oscillations depending only on the curvature intensity are reported, providing a new feature that represents an alternative way to optimize the transport through the device by tuning its geometry.
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