The adopted computational method combines Green’s function technique and the Landauer-type phase-coherent transport formalism. The nanostructures are modeled with atomic-size precision. In the SC case a modified recursion method has been developed, with the first iteration step corresponding to the vertical transport among the electrode-supported GNR and the electrodes. Next, the recursion involves consecutive periodicity units of the suspended segment.

It turns out that typically the high aspect ratio (wider than long) EC systems have higher conductance and lower Fano factor than their SC counterparts. This is visualized in the figure for the parallel alignment of the ferromagnetic electrodes (↑↑). A similar behavior also holds for the antiparallel configuration (↑↓).

This type of graphene nanoribbon is advantageous for miniaturization and can potentially serve as high-performance interconnects in carbon-based integrated circuits. Remarkably, at the same time the EC GNRs also exhibit a fairly large GMR, although the less conductive SC systems usually show even larger GMR values.

More details can be found in the journal Nanotechnology.