Hi, part of links are broken. I also want to compute separately conductance
up-up, down-down, up-down and down-up.
I read the threads where up, but I still not sure if i implemented in code
correctly with these informations.
In my code i use rashba interaction (in code):
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def rashba(xi, yi, xj, yj, alpha, t):
#d_ij = sitej.pos - sitei.pos
x_ij = xj - xi
y_ij = yj - yi
rashb = 1j * alpha * (sigma_x * y_ij - sigma_y * x_ij)
return (rashb - t * sigma_0)
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i use norbs=1, because is only electrons
And in conductances computations i've implemented (in code):
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smat = kwant.smatrix(syst, energy)
t = np.matrix(smat.submatrix(1, 0)) #trasmission block from S-matrix
tt_mat = np.matmul(t, t.getH()) # t*t_dagger matrix
tt = np.trace(np.matmul(t, t.getH())) #trace of t*t_dagger = total
transmission counts (up/down)
#getting upup Transmission, downdown and downup
#up-up t*t_dagger block
t11 = np.trace(np.matrix([[tt_mat[i,j] for j in range(int(len(tt_mat)/2))]
for i in range(int(len(tt_mat)/2))]))
#down-down t*t_dagger block
t22 = np.trace(np.matrix([[tt_mat[i + int(len(tt_mat)/2), j +
int(len(tt_mat)/2)] for j in range(int(len(tt_mat)/2))] for i in
range(int(len(tt_mat)/2))]))
#down-up t*t_dagger block
t21 = np.trace(np.matrix([[tt_mat[i + int(len(tt_mat)/2), j] for j in
range(int(len(tt_mat)/2))] for i in range(int(len(tt_mat)/2))]))
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It is completely incorrect compute using these form?
I've tryed by smat.transmission((1,0), (0,0)) structure but i got error, and
decide to try these aproach above.
by information the i got using smat.transmission((1,0), (0,0)) structure:
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return self.out_block_coords(lead_out), self.in_block_coords(lead_in)
File
"C:\Users\Diego\AppData\Roaming\Python\Python39\site-packages\kwant\solvers\common.py",
line 854, in in_block_coords
self.in_block_offsets[lead_ind][block_ind + 1])
IndexError: index 2 is out of bounds for axis 0 with size 2
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Thanks in advance!
