The form and origin of orbital ordering in the electronic nematic phase of iron-based superconductors
The form and origin of orbital ordering in the electronic nematic phase of iron-based superconductors
复制标题
铁基超导体电子向列相轨道有序的形式和起源
DOI:
10.1088/0953-8984/27/10/105702
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发表时间:
2014-02
期刊:
影响因子:
--
通讯作者:
Li, Tao
中科院分区:
文献类型:
--
作者:
Su, Yuehua;Liao, Haijun;Li, Tao
We investigated the form of orbital ordering in the electronic nematic phase of iron-based superconductors by applying a group theoretical analysis on a realistic five-band model. We find the orbital order can be either of the inter-orbital s-wave form or intra-orbital d-wave form. From the comparison with existing ARPES measurements of band splitting, we find the orbital ordering in the 122 system is dominated by an intra-orbital d-wave component, while that of the 111 system is dominated by an inter-orbital s-wave component. We find both forms of orbital order are strongly entangled with the nematicity in the spin correlation of the system. The condensation energy of the magnetic ordered phase is found to be significantly improved (by more than 20%) when the degeneracy between the (π, 0) and (0, π) ordering pattern is lifted by the orbital order. We argue there should be a large difference in both the scattering rate and the size of the possible pseudogap on the electron pocket around the X = (π, 0) and Y = (0, π) point in the electronic nematic phase. We propose this as a possible origin for the observed nematicity in resistivity measurements.
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影响因子:
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作者:
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通讯作者:
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DOI:
--
发表时间:
2011-03
期刊:
Bulletin of the American Physical Society
影响因子:
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DOI:
10.1073/pnas.1015572108
发表时间:
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影响因子:
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作者:
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通讯作者:
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