Dear Juan Manuel, In order to get a more selfconsistent results, I think you should do transiesta for very bias. But as for your system, this effect maybe can be negelected, so you get two results with no significant difference and this is usually at low bias. If you do want to use the TSHS file for zero bias to generate the current for every bias, indeed you need not to run TBtrans for every bias but zero. You can use the transimission function of zero bias to do the integeral using different up and low boudary. Usually, at this region [-V/2-30k_bT, V/2+30k_bT]. And then multiply the results by e/h.
Guangping 2012-04-13 Guangping Zhang 发件人：Juan Manuel Aguiar 发送时间：2012-04-12 22:52 主题：[SIESTA-L] IV characteristics 收件人："siesta-l"<[email protected]> 抄送： Dear Siesta Users, I have a very simple question for those regular users of transiesta and tbtrans: for plotting IV characteristics; do I have to run transiesta for every bias? I've done a test with a small system (a single wall CNT) and I found no difference between running transiesta and then tbtrans for every bias or just running transiesta for 0 bias and then tbtrans for all the bias values. I think that this question is answerd easyly: yes or no. Let me know if I had to deliver details of the calculation I expect to do. Juan Manuel
