Iron pnictides and chalcogenides are important family of high-Tc superconductors with exotic pairing mechanism which are still actively explored. The interplay between spin, orbital and lattice are very vital to understand the superconductivity and related properties.<br>

We are interested in the electronic and magnetic properties of iron pnictides and chalcogenides. <br>



<p>
<b>(a) iron pnictide </b> <br>
We investigate the low energy electron and spin dynamics in NaFe<sub>0.5</sub>Cu<sub>0.5</sub>As, a structurally and magnetic ordered parent compound of superconducting pnictide NaFeAs. <br> 

Reference:
<li>
<b>S. Zhang</b>, Y. He, J.-W. Mei*, F. Liu* and Z. Liu* <br>
Electronic and spin dynamics in the insulating iron pnictide NaFe<sub>0.5</sub>Cu<sub>0.5</sub>As. <br>
<a href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.245128">
Phys. Rev. B 96, 245128 (2017). </a> <br>
<a href="https://arxiv.org/abs/1708.08065">
arXiv pre-print </a> <br>
<a href="../pub_local_copy/2017/2017-PRB-Electronic and spin dynamics in the insulating iron pnictide NaFe0.5Cu0.5As.pdf">
local copy </a> <br>
</li>
</p>


<p>
<b>(b)iron pnictides </b> <br>

We investigate the electronic nematicity in FeSe. Through delicate first-principles calculations with wavefunction pre-conditioning, we identify a previously unknown nematic solution on the paramagnetic energy landscape, which exhibiting electronic structure reminiscent of recent ARPES observations. <br>

Reference£º
<li>
X. Long, <b>S. Zhang</b>, F. Wang, and Z. Liu* <br>
A first-principle perspective on electronic nematicity in FeSe. <br>
<a href="https://www.nature.com/articles/s41535-020-00253-x" >
npj Quantum Mater. 5, 50 (2020) </a> <br>
<a href="../pub_local_copy/2020/2020-npjQM-A first-principle perspective on electronic nematicity in FeSe.pdf">
local copy </a> <br>
</li>
</p>