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arXiv · 1806.08907

The driving mechanism of the d-wave orbital order in the iron-based superconductors

Da-Wei Yao·Tao Li
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Abstract

We study the driving mechanism and the form of the orbital order in the electronic nematic phase of the iron-based superconductors(IBSs) within the random phase approximation of a 5-band model. We find the magnetic correlation energy of the system can be significantly improved when an orbital order of the d-wave form is spontaneously generated. On the other hand, the magnetic correlation energy increases as one introduce either an on-site or an extended s-wave orbital order. More specifically, we find that the on-site orbital order is disfavored by the Hund's rule coupling and the extended s-wave orbital order is disfavored by the stripy magnetic correlation pattern in the IBSs.

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Da-Wei Yao, Tao Li. 2018-06-23. The driving mechanism of the d-wave orbital order in the iron-based superconductors. https://doi.org/10.1088/1361-648x/aaec23

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