kwant.plotter.sys_leads_hoppings

kwant.plotter.sys_leads_hoppings(sys, num_lead_cells=2)[source]

Return all the hoppings of the system and of the leads as an iterator.

Parameters
syskwant.builder.Builder or kwant.system.System instance

The system, sites of which should be returned.

num_lead_cellsinteger

The number of times lead sites from each lead should be returned. This is useful for showing several unit cells of the lead next to the system.

Returns
hoppingslist of (hopping, lead_number, copy_number) tuples

A site is a Site instance if the system is not finalized, and an integer otherwise. For system sites lead_number is None and copy_number is 0, for leads both are integers.

lead_cellslist of slices

lead_cells[i] gives the position of all the coordinates of lead i within hoppings.

Notes

Leads are only supported if they are of the same type as the original system, i.e. hoppings of BuilderLead leads are returned with an unfinalized system, and hoppings of InfiniteSystem leads are returned with a finalized system.

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