Hi,
I got the complex conductivity vs. frequency table of a metamaterial. Its first lines are like this:
f conductivity
1GHz 0.004+0.00297i
1.1GHz 0.004+0.00295i
1.2GHz 0.003+0.00294i
the table goes up to 10GHz.
Now the problem is that I need to enter...
Hi,
I just read a physics paper and there it expands signum of a sine function as below:
sgn(sin(wt))=(4/pi)*{sin(wt)+(1/3)*sin(3wt)+(1/5)*sin(5wt)+...}
How can we expand sgn(sin(wt)) like this?
Thanks.
Hi,
I just read a paper on graphene's basic properties and it says that since current density J is given as
J=q*n*v
where q is the elementary charge, n is the electron density and v is the Fermi velocity of electrons and for graphene n=6*10^12 cm^-2 and v=10^8 cm/s, the current density...
Letter to a professor!
Hello,
I'm doing my PhD work and I'm planning to go to a university that has experimental opportunities on my thesis. I'm thinking to send a letter to the professors who are the heads of those experimental laboratories. I found some places and profs.
But I have a...
Hi all,
Sorry for starting a new thread that is similar to another previous one but the question I'll ask is different in fact.
Please consider the DOS of a metallic CNT given in this thread: https://www.physicsforums.com/showthread.php?t=351722
On the other hand, the DOS of 1-D...
Hi again,
In the same book of Hanson, the equation for the DOS of 1-D wires are given as
http://img5.imageshack.us/img5/5562/adszvkj.jpg
How can I determine the Enx,ny values for this equation for the given DOS plot at the first post? DOS function seems to start from 0 however it is...
Thank you again, Sokrates.
Yes, according the plot given, there seems only 1 conduction channel. Hence, the conductance of the CNT will then be
G= \\{2q^2}/{h}
totally for spin up and spin down electronic current. However, in the literature (and in the book I mentioned) it is written that...
Thank you sokrates.
So, for example, if we inject electrons having 0.5eV, then does it mean that there will be only one conduction mode for these electrons?
DOS of metallic CNT
Hi all,
I am in doubt on a subject. The density of states function of a metallic CNT, is given as
http://img196.imageshack.us/img196/5629/adszuci.jpg
in the book "Introduction to Nanoelectronics" of Hanson. On the other hand, in the same book, it is said that...