Thanks for your advice!
I will read the manual more carefully.

2010/10/17 Guangping Zhang <zgp...@126.com>

>  Dear holin,
> I guess you are a new user to siesta as I am. As a newer there is indeed
> some difficulty to overcome.But I think the best way to get a summary
> knowledge is to read the manual carefully despite there is some difficulty
> to understand the content when first read it.But as you read it time by
> time,you can understand it gradually.
> Alternatively, you can get help on the 'Siesta&Smeagol&Atk' board in 'emuch
> forum'(http://emuch.net). Hope you can join our discuss (usully simple
> questions and this question you also can search the previous discuss in this
> mail list.But unfortunately,in China unless your net can support IPv6, you
> can not visit http://www.mail-archive.com/siesta-l@uam.es the mail
> list.But you can google you problem,if the question was discussed in the
> mail list before,the google can find it,and you can use this wet (
> http://www.7daili.com/) to open the relative discuss.) and yet we can turn
> to this mail list if we have something unsolved.
>
> As your question,you can find the solution on page 97 of the manual of
> siesta-3.0-b.It says:"The energy scale in tbtrans is shifted so that the
> Fermi level of the system, if no voltage were
> applied, is zero."
> Hope to make friend with you, I am also a newer to siesta.
>
> Cheer!
> 2010-10-17
> ------------------------------
> Guangping Zhang
>  ------------------------------
>  发件人: holin chen <chenholin....@gmail.com>
> 发送时间: 2010-10-16 16:22
> 主 题: [SIESTA-L] A question about transmission plot
> 收件人: siesta-l <siesta-l@uam.es>
>
>
> Dear friends,
>          Tbtrans generates scat.AVTRANS file in each folder. First column
> is Energy, the second one is transmission.
> My question is whether the energy of transmission is E or E-Ef (Ef is the
> Fermi energy)?
> In my opinion, if it's E, we should first find out the Ef, and then set
> the TS.TBT.Emin Ef-V/2  ;  TS.TBT.Emax   Ef+V/2;( V is the bias voltage)
> otherwise we just need to set TS.TBT.Emin  -V/2      TS.TBT.Emax +V/2?
>
>          Thank you in advance.
>
> Holin Chen
>
>

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