| Title: |
Phase transitions in a frustrated biquadratic Heisenberg model with coupled orbital degree of freedom for iron-based superconductors |
| Authors: |
Zhuo, W. Z., Qin, M. H., Dong, S., Li, X. G., Liu, J. M. |
| Source: |
Physical Review B 93, 094424 (2016) |
| Publication Year: |
2016 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons |
| More Details: |
In this work, we study a biquadratic Heisenberg model with coupled orbital degree of freedom using Monte Carlo simulation in order to investigate the phase transitions in iron-based superconductors. The antiferro-quadrupolar state, which may be related to the magnetism of FeSe [Phys. Rev. Lett. 115, 116401 (2015)], is stabilized by the anisotropic biquadratic interaction induced by a ferro-orbital-ordered state. It is revealed that the orbital and nematic transitions occur at the same temperature for all the cases, supporting the mechanism of the orbital-driven nematicity as revealed in most recent experiments [Nat. Mater. 14, 210 (2015)]. In addition, it is suggested that the orbital interaction may lead to the separation of the structural and magnetic phase transitions as observed in many families of iron pnictides.
Comment: 20 pages, 7 figures, to be published in Physical Review B |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevB.93.094424 |
| Access URL: |
http://arxiv.org/abs/1603.01669 |
| Accession Number: |
edsarx.1603.01669 |
| Database: |
arXiv |
