Orbital-selective Mott phase in multiorbital models for iron pnictides and chalcogenides
Orbital-selective Mott phase in multiorbital models for iron pnictides and chalcogenides
复制标题
铁磷族化物和硫族化物多轨道模型中的轨道选择性莫特相
DOI:
10.1103/physrevb.96.125110
复制
发表时间:
2017-05
影响因子:
3.7
通讯作者:
Qimiao Si
中科院分区:
文献类型:
--
作者:
Rong Yu;Qimiao Si
There is increasing recognition that the multiorbital nature of the 3d electrons is important to the proper description of the electronic states in the normal state of the iron-based superconductors. Earlier studies of the pertinent multiorbital Hubbard models identified an orbital-selective Mott phase, which anchors the orbital-selective behavior seen in the overall phase diagram. An important characteristics of the models is that the orbitals are kinetically coupled -- i.e. hybridized -- to each other, which makes the orbital-selective Mott phase especially nontrivial. A U(1) slave-spin method was used to analyze the model with nonzero orbital-level splittings. Here we develop a Landau free-energy functional to shed further light on this issue. We put the microscopic analysis from the U(1) slave-spin approach in this perspective, and show that the intersite spin correlations are crucial to the renormalization of the bare hybridization amplitude towards zero and the concomitant realization of the orbital-selective Mott transition. Based on this insight, we discuss additional ways to study the orbital-selective Mott physics from a dynamical competition between the interorbital hybridization and collective spin correlations. Our results demonstrate the robustness of the orbital-selective Mott phase in the multiorbital models appropriate for the iron-based superconductors.
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影响因子:
16.6
作者:
通讯作者:
--
影响因子:
3.7
作者:
Florens, S;Georges, A
通讯作者:
Georges, A
影响因子:
8.6
作者:
KOTLIAR, G;RUCKENSTEIN, AE
通讯作者:
RUCKENSTEIN, AE
DOI:
10.1103/physrevb.96.125111
发表时间:
2017-05
期刊:
arXiv: Strongly Correlated Electrons
影响因子:
--
作者:
Y. Komijani;G. Kotliar
通讯作者:
Y. Komijani;G. Kotliar
影响因子:
3.7
作者:
A. Rüegg;A. Rüegg;S. Huber;S. Huber;M. Sigrist
通讯作者:
A. Rüegg;A. Rüegg;S. Huber;S. Huber;M. Sigrist