Recent content by Otterhoofd

Link to the paper: http://www.sciencemag.org/cgi/content/abstract/329/5987/61 Quantized Anomalous Hall Effect in Magnetic Topological Insulators by R.Yu et al. Thanks for the replies so far!

I was reading an article, and it said that the total free energy of the system in an external magnetic field H can be written as: F= 0.5 * χe^(-1) * Me^2 + 0.5 * χl^(-1) * Ml^2 - Jeff*Ml*Me - (Ml+Me)H Where Ml and Me denote the magnetization for the local moment and electron subsystem. J_eff...

Thanks Weejee, I'll definitely read the articles.

I've recently started learning about topological insulators. I've read a considerable amount of (review) papers on the subject, yet I still only have a phenomenological understanding of what a topological insulator is. I know for example, that the gapless surface states have to be there because...

Homework Statement You have a solar cell with a constant electron density n, and known dimensions. I am looking for the change in density due to diffusion, so basically the diffusion current. All other relevant parameters are also known (temperature, D diffusion constant, etc.) To summarize...

Thanks, i already thought this had to be the case. Explanation in my lecture notes is a bit sloppy I think. Thanks for your explanation, everything is clear to me again!

Homework Statement I was looking the calculation of Landé g factor. It starts with \mu=-\frac{e}{2m_{e}} (\vec{L}+2\vec{S}) assuming that g of electron =2 The lecture notes then proceed by calculating g=1+\frac{J(J+1)+S(S+1)-L(L+1)}{2J(J+1)} using the cosine rule.Homework Equations the...