Dear Swastick,
If your question concerns visualizing a deformed system (Nanobubbles in
graphene for example) you can do that as follow:
1) Define a new graphene lattice (use: kwant.lattice.general) and introduce
the z -component in the vectors and unit cell.
2) Use the option : pos_transform in kwant.plotter.plot to show the
buckling.
kwant.plotter.plot(*sys*, *num_lead_cells=2*, *unit='nn'*,
*site_symbol=None*, *pos_transform=None*)
*pos_transform: *function or *None*
Transformation to be applied to the site position.
A result of such use can be seen in this paper [1]
If you want to find how to study quantum transport in deformed systems you
can proceed the following way (example of graphene):
1) Keep your system in 2D and not deformed (this will save your memory
needs and speed up the calculation)
2) Modify the hopping of the system as induced by the deformation. Example:
# deformation shape
def z(x,y):
a=0.3
return exp(-a*(x**2+y**2))
def hop(site1,site2)
beta=3.37
x1,y1=site1.pos
x2,y2=site2.pos
d0=sqrt((x1-x2)**2+(y1-y2)**2) #distance between
connected sites without deformation
d=sqrt((x1-x2)**2+(y1-y2)**2+ (z(x1,y1)-z(x2,y2))**2) #
distance after deformation
t=t0* exp(- beta*(d/d0)**2-1) # the change in the
hopping due to the deformation
return t
I hope this helps,
Adel
[1] Phys. Rev. B *105*, 075425 (2022)
On Thu, Oct 26, 2023 at 5:12 AM Swastik Sahoo <swastik.saho...@gmail.com>
wrote:
> Hello,
> I want to introduce buckling term to the lattice structure of buckled
> monolayer Xenes like silicene, germanene, stanene etc. to differentiate
> them from planar graphene. Will the lattice structure be able to show the
> buckling ?
>
> Thanks and Regards,
> Swastik Sahoo.
> Research Scholar, EE Dept.
> IIT Bombay.
> Ph. No- 9980387383
> mail id:- swastik.saho...@gmail.com
> swas...@ee.iitb.ac.in
>
>
--
Abbout Adel
