Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

I'm currently trying to investigate the edge current on a finite strip of Zigzag Haldane model (spinless, pi/2 phase) and I measure the current (in my code) by taking the expectation value of my current operator which is a function of wavevector k, for each eigenvector of the wavevector-dependent Hamiltonian H(k). The current operator is the net directional hopping matrix when considering only a line across the sample.

When I set the fermi level at the point of the top of the edge mode band, I get zero net current, for a quantum hall system, should this not be a non-zero current? Im confused

Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Haldane Model: Does edge current exist for a filled band?

**Physics Forums | Science Articles, Homework Help, Discussion**