Thank you for your quick response. I am using kwant 1.3.3 version and
semicon 0.1.0 version. I think the error is related to calling parameters
function which are stored as a tuple. By the way, this is the error I
encountered:
TypeError Traceback (most recent call
last)/home/ali/anaconda3/lib/python3.6/site-packages/kwant/builder.py
in hamiltonian(self, i, j, params, *args) 1995
try:-> 1996 value = value(self.sites[i],
**params) 1997 except Exception as exc:
<string> in onsite(site, Delta_0, E_0, E_v, P, gamma_0, gamma_1,
gamma_2, hbar, k_y, m_0)
TypeError: __call__() takes 2 positional arguments but 3 were given
The above exception was the direct cause of the following exception:
UserCodeError Traceback (most recent call
last)<ipython-input-5-9c34d828bfe1> in <module>() 59 # compute
the scattering matrix at a given energy 60 p = {'k_y': 0,
**two_deg_params}---> 61 smatrix = kwant.smatrix(syst, energy,
params=p) 62 63 # compute the transmission probability
from lead 0 to
/home/ali/anaconda3/lib/python3.6/site-packages/kwant/solvers/common.py
in smatrix(self, sys, energy, args, out_leads, in_leads,
check_hermiticity, params) 370 linsys, lead_info =
self._make_linear_sys(syst, in_leads, energy, args, 371
check_hermiticity, False,--> 372
params=params)
373 374 kept_vars = np.concatenate([coords for i, coords
in
/home/ali/anaconda3/lib/python3.6/site-packages/kwant/solvers/common.py
in _make_linear_sys(self, sys, in_leads, energy, args,
check_hermiticity, realspace, params) 162 lhs, norb =
syst.hamiltonian_submatrix(args, sparse=True, 163
return_norb=True,--> 164
params=params)[:2] 165 lhs =
getattr(lhs, 'to' + self.lhsformat)() 166 lhs = lhs -
energy * sp.identity(lhs.shape[0], format=self.lhsformat)
kwant/_system.pyx in kwant._system.hamiltonian_submatrix()
/home/ali/anaconda3/lib/python3.6/site-packages/kwant/builder.py in
hamiltonian(self, i, j, params, *args) 1996
value = value(self.sites[i], **params) 1997
except Exception as exc:-> 1998
_raise_user_error(exc, value) 1999 else: 2000
try:
/home/ali/anaconda3/lib/python3.6/site-packages/kwant/builder.py in
_raise_user_error(exc, func) 1883 msg = ('Error occurred in
user-supplied value function "{0}".\n' 1884 'See the
upper part of the above backtrace for more information.')-> 1885
raise UserCodeError(msg.format(func.__name__)) from exc 1886 1887
UserCodeError: Error occurred in user-supplied value function "onsite".
See the upper part of the above backtrace for more information.
On Tue, Dec 4, 2018 at 3:21 PM Joseph Weston <joseph.westo...@gmail.com>
wrote:
> Hi Ali,
>
>
> > I want to find conductance of a heterostructure using semicon library.
> > When I just use coords='z', everything is OK. But, when I want to
> > change it to two dimensions like 'xz', I encounter an error. Would you
> > please tell me how I can fix it? I hope it is not just a
> > simple mistake which I am not aware. Your time and consideration are
> > greatly appreciated in advance. Please find attached the code
> > correspondent to what I mentioned above.
>
>
> Thanks for posting the script, but you'll need to give more information
> before anyone else can help you:
>
>
> + what version of Kwant and semicon are you using
>
> + what error was produced? Please provide a full traceback
>
>
> Happy Kwanting,
>
>
> Joe
>
>
