Dear forum people,(adsbygoogle = window.adsbygoogle || []).push({});

I just learned how to get a tight-binding dispersion for graphene:

[itex] E = +- \sqrt{1+4\cos((\sqrt{3}a/2) k_x)\cos((a/2) k_y)+4\cos^2((a/2) k_y)} [/itex]

But i can not figure out how can I plot that. I want to plot that in the following path: [itex] K \rightarrow \Gamma \rightarrow M \rightarrow K[/itex].

I think k_y = 0 in the line [itex]\Gamma M[/itex] and I should plot(E,k_x); k_x = constant in the line MK and I should plot(E,k_y); but I don't know how the plot() is look like for [itex]K \Gamma[/itex], where both k_x and k_y are not constant.

For nanotube, I was able to do that becouse we just had k, so I just made "plot(E,k,'b')". Here in graphene, we have both [itex] k_x, k_y[/itex].

I would be appreciated if could some one give me a hand on my problem.

Best wishes for all.

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# How to Plot a 2D band structure?

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