Hi develops,
I'm trying to build a diatomic chain 1D in kwant, with two differents hopping
parameters (intracell and extracell). But when i try to attach the lead, it
doesn't work. Can anyone help me?
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L = 5
C = 5
t1 = 4 # hopping intracell
t2 = 5 # hopping extracell
lat = kwant.lattice.general([(C,0),(0,1)],[(0,0),(2,0)], norbs=1)
a, b = lat.sublattices
syst = kwant.Builder()
for i in range(L):
syst[a(i, 0)] = 0
syst[b(i, 0)] = 0
syst[kwant.builder.HoppingKind((1, 0), a, b)] = -t1
syst[kwant.builder.HoppingKind((1, 0), b, a)] = -t2
kwant.plot(syst)
plt.show()
sym_lead1 = kwant.TranslationalSymmetry(lat.vec((-1, 0)))
lead1 = kwant.Builder(sym_lead1)
lead1[lat(0,0)] = 0
lead1[lat(1,0)] = 0
lead1[kwant.builder.HoppingKind((1, 0), a, b)] = -t1
lead1[kwant.builder.HoppingKind((1, 0), b, a)] = -t2
syst.attach_lead(lead1)
kwant.plot(syst);
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TypeError Traceback (most recent call last)
<ipython-input-38-06cd19c77c10> in <module>
3
4 lead1 = kwant.Builder(sym_lead1)
----> 5 lead1[lat(0,0)] = 0
6 lead1[lat(1,0)] = 0
7 lead1[kwant.builder.HoppingKind((1, 0), a, b)] = -t1
TypeError: 'Polyatomic' object is not callable
