Doping dependence of antiferromagnetism in models of the pnictides

Jacob Schmiedt; P. M. R. Brydon; Carsten Timm

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Doping dependence of antiferromagnetism in models of the pnictides

机译：剂型模型中反铁磁性的掺杂依赖性

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We study the doping dependence of the spin-density-wave (SDW) state in four models of the 1111 pnictides. The random-phase approximation is used to determine the ordering temperature and the ordering vector as functions of doping, and to evaluate the contribution of the various orbitals to the SDW instability. In addition to the usual assumption of orbitally rotation-invariant interactions, we consider the effect of reduced interactions involving the xy orbital, which are anticipated by crystal-structure considerations. We find that changing the relative strength of the interaction in the xy orbital tunes the system between different nesting instabilities, leading to similar SDW order. We identify two models as showing reasonable agreement with experiments, while the other two display significant discrepancies, and discuss the underlying differences between the models.

机译：我们研究了1111 nic素的四个模型中自旋密度波（SDW）状态的掺杂依赖性。随机相位近似用于确定作为掺杂函数的有序温度和有序向量，并评估各种轨道对SDW不稳定性的影响。除了通常的关于轨道旋转不变相互作用的假设外，我们还考虑了涉及xy轨道的相互作用减少的影响，这是晶体结构方面的考虑。我们发现，改变xy轨道中的相互作用的相对强度会在不同的嵌套不稳定性之间调整系统，从而导致相似的SDW顺序。我们将两个模型确定为与实验具有合理的一致性，而其他两个模型则显示出明显的差异，并讨论了模型之间的潜在差异。

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来源
《Physical review》 |2012年第21期|p.214425.1-214425.10|共10页
作者
Jacob Schmiedt; P. M. R. Brydon; Carsten Timm;
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作者单位

Institut fuer Theoretische Physik, Technische Universitaet Dresden, 01062 Dresden, Germany;

Institut fuer Theoretische Physik, Technische Universitaet Dresden, 01062 Dresden, Germany;

Institut fuer Theoretische Physik, Technische Universitaet Dresden, 01062 Dresden, Germany;

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正文语种 eng
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lattice fermion models (hubbard model, etc.); band and itinerant models;

机译：格子费米子模型（哈伯德模型等）;带和巡回模型;

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1. Microscopic coexistence of antiferromagnetism and superconductivity in hole-doped Iron-pnictides Ba_(0.77)K_(0.23)Fe_2As_2 revealed by NMR [J] . Zhou R., Li Z., Yang J., Hyperfine Interactions: Journal Devoted to Research in the Border Regions of Solid State, Atomic and Nuclear Physics . 2013,第1a3期

机译：核磁共振显示空穴掺杂的铁素体Ba_（0.77）K_（0.23）Fe_2As_2中反铁磁性和超导电性的微观共存
2. Microscopic coexistence of antiferromagnetism and superconductivity in hole-doped Iron-pnictides Ba0.77K0.23Fe2As2 revealed by NMR [J] . R. Zhou, Z. Li, J. Yang, Hyperfine Interactions . 2013,第1a3期

机译：核磁共振显示空穴掺杂的铁素体Ba0.77K0.23Fe2As2中反铁磁性和超导电性的微观共存
3. Band antiferromagnetism in a two-band model for iron pnictides [J] . Tobias Schickling EPL . 2014,第6期

机译：铁离子两波段模型中的波段反铁磁性
4. Coexistence Of Superconductivity, Ferromagnetism And Antiferromagnetism In Iron Pnictides [C] . Raminder Gill International Conference on Condensed Matter and Applied Physics . 2016

机译：铁毒率中超导，铁磁性和反铁磁体的共存
5. A model of coexistence of antiferromagnetism and superconductivity in electron- and hole-doped cuprates. [D] . Das, Tanmoy. 2009

机译：电子和空穴掺杂的铜酸盐中反铁磁性和超导性共存的模型。
6. Doping dependence of spin excitations and its correlations with high-temperature superconductivity in iron pnictides [O] . Meng Wang, Chenglin Zhang, Xingye Lu, -1

机译：铁化物中自旋激发的掺杂依赖性及其与高温超导的关系
7. Doping dependence of spin excitations and its correlations with high-temperature superconductivity in iron pnictides [O] . Wang M, Zhang C, Lu X, 2013

机译：铁化物中自旋激发的掺杂依赖性及其与高温超导的关系

Doping dependence of antiferromagnetism in models of the pnictides

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