Controlling local currents in molecular junctions
arXiv:1606.00638 · doi:10.1103/PhysRevB.94.115424
Abstract
The effect of non-equilibrium constraints and dephasing on the circulating currents in molecular junctions are analyzed. Circulating currents are manifestations of quantum effects and can be induced either by externally applied bias or an external magnetic field through the molecular system. In symmetric Aharonov-Bohm ring, bond currents have two contributions, bias driven and magnetic field driven. We analyze the competition between these two contributions and show that, as a consequence, current through one of the branches can be completely suppressed. We then study the effect of asymmetry (as a result of chemical substitution) on the current pathways inside the molecule and study asymmetry induced circulating currents (without magnetic field) by tuning the coupling strength of the substituent (at finite bias).
16 pages, 14 figures
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Cited by in corpus (5)
- On simulation of local fluxes in molecular junctions
- Current Correlations in a Quantum Dot Ring: A Role of Quantum Interference
- Statistics of work done in degenerate parametric amplification process
- Fingerprints of Majorana bound states in quantum-rings
- Current in nanojunctions : Effects of reservoir coupling