Dear Chong Wang,<br />
     I suppose that empty scattering centre with leads mean transport takes place between the two <br />
reservoirs in ballistic regime; because the leads act as the 1D or 2D conductors without any potential <br />
barrier in the path of the transport. In my idea, should we not model such system as a 1D QWR or 2D QW?<br />
The unit cell copied from any of the leads would ensure the continuity of the conductor in which <br />
ballistic transport without any scattering takes place.<br />
Cheers!<br />
K.K.Ghosh <br />
On Wed, 11 May 2016 17:51:55 +0530 Anton Akhmerov <anton.akhmerov+kd@gmail.com> wrote<br />
>Hi Chong Wang,<br />
<br />
<br />
<br />
You just need to create a scattering region that corresponds to a unit<br />
<br />
cell of one of the leads.<br />
<br />
<br />
<br />
Cheers,<br />
<br />
Anton<br />
<br />
<br />
<br />
On Wed, May 11, 2016 at 1:59 PM, Chong Wang <ch-wang@outlook.com> wrote:<br />
<br />
> Hi,<br />
<br />
><br />
<br />
><br />
<br />
> I want to calculate conductance between two different leads. This is what I<br />
<br />
> have tried:<br />
<br />
><br />
<br />
><br />
<br />
> 1. build an empty center area. This does not work because kwant doesn't know<br />
<br />
> how to attach leads to an empty area.<br />
<br />
><br />
<br />
><br />
<br />
> 2. use lead_1.attach_lead(lead_2). Kwant.plot does not correctly plot two<br />
<br />
> leads, so I suppose it doesn't work.<br />
<br />
><br />
<br />
><br />
<br />
> I don't want to build a center area that is the same with one of the leads,<br />
<br />
> because my system is very large and I suppose this will be time-consuming.<br />
<br />
><br />
<br />
><br />
<br />
> Best!<br />
<br />
><br />
<br />
><br />
<br />
> Chong Wang<br />
<br />
><br />
<br />
> Ph. D. candidate<br />
<br />
><br />
<br />
> Institute of Advanced Study, Tsinghua University, Beijing 100084<br />
<br />
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