Abstract
We present the first transport property investigation of a-few-nanometer-long armchair graphene nanoribbon (AGNR) p–n junctions by using first-principles method. Intriguingly, family dependent rectification is observed. To be specific, traditional rectification effect in the forward direction is observed in the AGNR p–n junctions with 3n and 3n + 2 widths, whereas reverse rectification effect is observed in the AGNR p–n junctions with 3n + 1 width. The analysis of the spatial distribution of molecular projected self-consistent Hamiltonian eigenstates and the projected density of states give an insight into the observed results.
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