kwant.plotter.sys_leads_hopping_pos(sys, hop_lead_nr)[source]

Return arrays of coordinates of all hoppings in a system.

Parameters: sys : ~kwant.builder.Builder or ~kwant.system.System instance The system, coordinates of sites of which should be returned. hoppings : list of (hopping, leadnr, copynr) tuples Output of sys_leads_hoppings applied to the system. coords : (end_site, start_site): tuple of NumPy arrays of floats Array of coordinates of the hoppings. The first half of coordinates in each array entry are those of the first site in the hopping, the last half are those of the second site.

Notes

This function uses site.pos property to get the position of a builder site and sys.pos(sitenr) for finalized systems. This function requires that all the positions of all the sites have the same dimensionality.