I recently saw this: http://arstechnica.com/science/2012/01/size-matters-when-things-are-just-right-water-flows-freely/
and was wondering whether it could be used on an airship to keep helium in the envelope (it often dissipates out).
Since graphene is just a 2d version of graphite, would...
Is there any simple justification about graphene having no band gap? How bout its linear E-K? Why bilayer graphene has a quadratic E-K and electric field can open a band gap there?
I do not completely understand the broken symmetry argument? Also Why MoS2 which has similar structure, do not...
Hi all. Is there any place where I can check how to derive the DOS of bilayer graphene subject to an external field. I have got the Hamiltonian right and solved the eenrgies but then I am not sure how to obtain the DOS right..
Thanks
Are there any "graphene" Planck-scale quantum gravity?
I'm wondering if there is any QG or emergent structure that is "graphene" due to suggestions from this paper, specifically,
does LQG, SF, CDT,M-theory, etc., suggest space consists of discrete points arranged in a non-cubic lattice...
I'm taking a graduate course on computational physics which has a project. I'm doing research
on electronic properties of graphene, like quantum hall effect measurements. So, I want to do the project related to my research.
The project shouldn't be too difficult, as I haven't done simulations...
Hi,
In the book of Hanson, the dispersion relationship for a graphene near K points are approximated by
E=hbar.vF.k where hbar-> reduced Planck's constant vF->Fermi velocity k-> wave number
and then it is said that, since this is similar to the energy of a photon
E=hbar.c.k where...
Hello all,
I have read a few papers lately that have used DFT based techniques to investigate metallic adatom adsorption on top of graphene (see for instance PRB 77, 235430 2008). I was under the impression that electrons in graphene are described by the Dirac equation and not the...
Hey everyone,
So I've been doing research in graphene for a semester and my colleague and I have had no luck making graphene samples.
We are using the "scotch-tape" method on Kish graphite. We use a small piece of one flake to put on weak tape (we find that the Magic Tape is too strong...
Hi all,
according to textbook definition the effective mass of a particle in a periodic potential is
\frac{\hbar^2}{m*} = \frac{d^2}{d k^2} E(k)
where E(k) is the energy dispersion.
Is this definition applicable at a generic point of a band, or only at the center and edge of the Brillouin...
Hello all,
I am beginning a new research project involving graphene. Although I have be actively doing a literature search on graphene, I was wondering if somebody would be will to suggest a good textbook that covers the basic of graphene
Thanks in advance
-Ed
Hello. I'm trying to find the individual contributions of carbon atoms to the charge carriers in graphene. In other words, I'm trying to answer "How many charge carriers does one carbon atom supply?"
Here is what I've done so far:
Taking the max. carrier density as 10^13 1/cm^2 and the...
Interesting article I read on how the highly-conductive graphene also begins to exhibit some semiconductive properties at very narrow dimensions:
http://www.technologyreview.com/Nanotech/20119/
http://physicsworld.com/cws/article/news/32539
Gee, I wonder if this could keep Moore's Law going?