Twin lead ballistic conductor based on nanoribbon edge transport
| Autor: | Martin Konôpka, Peter Dieška |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics FOS: Physical sciences Nanotechnology 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Conductor Zigzag law Electrical network 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Resistor Electric current 010306 general physics 0210 nano-technology Electrical conductor Electronic circuit Voltage |
| DOI: | 10.48550/arxiv.1701.03815 |
| Popis: | If a device like a graphene nanoribbon (GNR) has all its four corners attached to electric current leads, the device becomes a quantum junction through which two electrical circuits can interact. We study such system theoretically for stationary currents. The 4-point energy-dependent conductance matrix of the nanostructure and the classical resistors in the circuits are parameters of the model. The two bias voltages in the circuits are the control variables of the studied system while the electrochemical potentials at the device's terminals are non-trivially dependent on the voltages. For the special case of the linear-response regime analytical formulae for the operation of the coupled quantum-classical device are derived and applied. For higher bias voltages numerical solutions are obtained. The effects of non-equilibrium Fermi levels are captured using a recursive algorithm in which self-consistency between the electrochemical potentials and the currents is reached within few iterations. The developed approach allows to study scenarios ranging from independent circuits to strongly coupled ones. For the chosen model of the GNR with highly conductive zigzag edges we determine the regime in which the single device carries two almost independent currents. Comment: 25 pages, 7 figures, Supplementary Material |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|