Figure 2

The electron transmission pathways and electron transmission eigenchannels under 1 eV voltage bias at the Fermi level. (a) Transmission pathways of the pristine SWCNT; (b) side view of the transmission pathways of the Cu-chain-SWCNT; (c) top view of transmission pathways of the Cu-chain-SWCNT; (d) electron transmission eigenchannels of the pristine SWCNT; (e) electron transmission eigenchannels of the Cu-chain-SWCNT. The thickness of the arrows indicates the level of the local current between each pair of atoms (a thicker arrow indicates a higher local current), and the colour of the arrows indicates the direction of the electron transport.