Ground state pairing correlations in the S₄ symmetric microscopic model for iron-based superconductors

2013/12/26 by Yang Wu, Guangkun Liu, Tianxing Ma
Physics and Astronomy · #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1209/0295-5075/104/27013

published as EPL 104, 27013(2013) · 5 pages, 5 figures. arXiv admin note: text overlap with arXiv:1202.5881 by other authors

arxiv created 2013/12/26 · arxiv updated 2013/12/30

Abstract

We present the ground state pairing correlations in the S₄ symmetric microscopic model for iron-based superconductors, computed with the constrained-path Monte Carlo method. For various electron fillings and interaction strengths, we find that the s_xy pairing dominates over other pairing correlations and is positive when the pair separation exceeds several lattice constants, whatever for iron pnictides and iron chlcogenides. These ground state properties, especially the long range part pairing correlations re-confirm the previous finite temperature results published in Phys. Rev. Lett. 110, 107002(2013). We further our study by including the nearest neighbour interaction V and it is found that the s_xy pairing correlation is slightly suppressed by the increasing V.

Citations

• S₄ Symmetric Microscopic Model for Iron-Based Superconductors