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General Questions and Answers / Re: Transmission eigenvalue and eigenstates
« on: April 7, 2016, 09:21 »
Thank you, Daniele, learned a lot! 
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General Questions and Answers / Re: Transmission eigenvalue and eigenstates
« on: March 30, 2016, 10:53 »
THX for the reply
<1.py >corresponds with the pic I posted previous, <2.py> is a different but similar system with <1.py> except for the centre region (more layer to make sure it's a insulator), I calculated 2.py and found contradiction with other published research using ATK (DOI: 10.1103/PhysRevApplied.2.044008).
As you can see in <fig 2_pic.png> current is 1.05nA under the bias of 0.4 V, which I think is amazingly high (up 0.1496nA;down 0.900nA) consider around 0eV both up and down component's transmission is very low (magnified spectrum in <fig2_pic_mag.png>). And this contradicts with the paper I mentioned above whose transmission is higher than me but current lower.
<1.py >corresponds with the pic I posted previous, <2.py> is a different but similar system with <1.py> except for the centre region (more layer to make sure it's a insulator), I calculated 2.py and found contradiction with other published research using ATK (DOI: 10.1103/PhysRevApplied.2.044008).
As you can see in <fig 2_pic.png> current is 1.05nA under the bias of 0.4 V, which I think is amazingly high (up 0.1496nA;down 0.900nA) consider around 0eV both up and down component's transmission is very low (magnified spectrum in <fig2_pic_mag.png>). And this contradicts with the paper I mentioned above whose transmission is higher than me but current lower.
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General Questions and Answers / Transmission eigenvalue and eigenstates
« on: March 27, 2016, 15:46 »
I have done a calculation on a 2 dimensional system with ATK to study it's spin-dependent transport properties. However after the transmission spectrum was generated, I can not calculate the transmission eigenvalue in one of the transmission "peak", let along eigenstates. (The "peak"s transmission is about 0.15. )
After I tried to calculate the eigenvalue in VNL, I tried to use script, and ended up with the following sentence
"Number of transmission modes = 0"
Since I have obtained a rather big transmission coefficient, I think no transmission channel in this system is rather strange.
BTW, I have also calculated the same system under bias and the current is bigger (*10) than some other published research, although the transmission is about 3 orders below.
Can any one help please?
After I tried to calculate the eigenvalue in VNL, I tried to use script, and ended up with the following sentence
"Number of transmission modes = 0"
Since I have obtained a rather big transmission coefficient, I think no transmission channel in this system is rather strange.
BTW, I have also calculated the same system under bias and the current is bigger (*10) than some other published research, although the transmission is about 3 orders below.
Can any one help please?
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