You can use the file *.AVTRANS in which the first column is Energy between
TS.TBT.Emin and TS.TBT.Emax you set,the second column is transmission
spectrum,the third is DOS and the fourth is PDOS.All of these information you
can find in the standard output of tbtrans under the following string.
E T(E) TotDOS PDOS
2010-11-15
Guangping Zhang
发件人: Zhendong Guo <[email protected]>
发送时间: 2010-11-15 17:22
主 题: Re: Re: Re: [SIESTA-L] How to understand the transmission coefficient
bigger than one.
收件人: [email protected]
Dear zhang,
Now, I want to plot the transmission coefficient, but I don't know how to
do, could you do me a favor?
Thank you in advance!
2010/9/16 Guangping Zhang <[email protected]>
Dear Henrik,
Thanks very much!
2010-09-16
Guangping Zhang
发件人: Henrik Löfås <[email protected]>
发送时间: 2010-09-16 18:03
主 题: Re: Re: [SIESTA-L] How to understand the transmission coefficient bigger
than one.
收件人: [email protected]
Dear Zhang,
This is not strange, since the results from TRANSIESTA are given in units of
G_0 (The quantum of conductance). For example in a 1D-system, if you have
resonant transport your maximum transmission would be 1 (G_0) since you only
have one eigenchannel. For a 3D-system things get more complex and you get more
eigenchannels, hence the total transmission can add up to more than one (in
units of G_0). So what happen between your calculations is probably that the
results get more converged and you open up more eigenchannels, hence get a
higer total transmission. For more info about transmission and eigenchannels,
see the basic paper for transiesta.
http://prb.aps.org/abstract/PRB/v65/i16/e165401
Regards
Henrik
2010/9/16 Guangping Zhang <[email protected]>
Dear Weslley,
Thanks for your help.It is nice of you.
2010-09-16
Guangping Zhang
发件人: Weslley Souza Patrocinio <[email protected]>
发送时间: 2010-09-15 22:07
主 题: Re: [SIESTA-L] How to understand the transmission coefficient bigger than
one.
收件人: [email protected]
Hi Zhang,
I'm not an expert in Transiesta but as a physicist I can give you some tips.
Some works in transmission coefficients using the Transport Matrix method shows
that in systems similar to quantum barriers is possible to occur coefficients
greater than one. I talked to one Cuban researcher in one meeting in 2008 which
works with this research line. His name is Leo-Diago Cisneiros, of Havana
University. You might search for his works and understood the results of this
features. I'm not saying that there is no error in the Transiesta calculations,
but there is other results that shows that is possible to obtain T > 1.
Yours,
Weslley.
--
Weslley Souza Patrocinio
Researcher
Nanotechnology group
Wernher von Braun Center for Advanced Research
e-mail: [email protected]
skype: weslley.vonbraun
--
Zhendong Guo
Institute of Microelectronics and Optoelectronics, Room 516,
Dept. of Information Science & Electronic Engineering
Zhejiang University
Hangzhou, China, 310027
Phone: 15168215062
Email: [email protected]
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