(361d) Analytic Approach to Magneto-Strain Tuning of Electronic Transport through a Graphene Nanobubble: Perspectives for a Strain Sensor
AIChE Annual Meeting
2020
2020 Virtual AIChE Annual Meeting
Nanoscale Science and Engineering Forum
Carbon Nanomaterials: Adsorption, Separations, and Transport Processes
Tuesday, November 17, 2020 - 8:45am to 9:00am
We consider the scattering of Dirac particles in graphene due to the superposition of an external magnetic field and mechanical strain. As a model for a graphene nanobubble, we find exact analytical solutions for single-particle states inside and outside a circular region submitted to the fields. Finally, we obtain analytical expressions for the scattering cross-section, as well as for the Landauer current through the circular region. Our results provide a fully-analytical treatment for electronic transport through a graphene nanobubble, showing that a combination of a physical magnetic field and strain leads to valley polarization and filtering of the electronic current. Moreover, our analytical model provides an explicit metrology principle to measure strain by performing conductance experiments under a controlled magnetic field imposed over the sample.
References
E. Muñoz and R. Soto-Garrido, Journal of Physics: Condensed Matter 29 (2017) 445302