import sys
sys.path.append('../code')
from init_mooc_nb import *
init_notebook()
As usual, start by grabbing the notebooks of this week (w6_3dti
). They are once again over here.
Simulations of the three-dimensional systems are hard, mostly because they take a lot of computational power. That's why we'll do something relatively simple this time.
One mechanism of opening the gap on the surface of a topological insulator is to bring it into contact with a ferromagnet, which creates an effective Zeeman field.
The BHZ model is rather rich and allows to produce every possible topological invariant. Can you find the parameter values that produce all the desired values of the invariants? (Hint: you need to make the model anisotropic).
MoocSelfAssessment()
Now share your results:
MoocDiscussion('Labs', '3DTI')
display_html(PreprintReference('1410.0655', description="What enters the measurement of a Dirac point conductance"))
display_html(PreprintReference('0811.1303', description="Consequences of magneto-electric effect"))
display_html(PreprintReference('1401.7461', description="Weak and strong topological insulators with disorder"))
display_html(PreprintReference('1311.1758', description="Topological, but not insulator"))
display_html(PreprintReference('1005.3762', description="Threading flux through a topological insulator"))
Do you know of another paper that fits into the topics of this week, and you think is good? Then you can get bonus points by reviewing that paper instead!
MoocPeerAssessment()
Do you have questions about what you read? Would you like to suggest other papers? Tell us:
MoocDiscussion("Reviews", "3DTI")