Pressure-induced magnetism in iron-based superconductors $A$Fe$_2$As$_2$ ($A=$ K, Cs, Rb)

Rustem Khasanov; Zurab Guguchia; Elvezio Morenzoni; Chris Baines; Aifeng Wang; Xianhui Chen; Zbigniew Bukowski; Fazel Tafti

doi:10.1103/PhysRevB.102.140502

Pressure-induced magnetism in iron-based superconductors $A$Fe$_2$As$_2$ ($A=$ K, Cs, Rb)

Superconductivity 2020-10-12 v1 Strongly Correlated Electrons

Authors: Rustem Khasanov , Zurab Guguchia , Elvezio Morenzoni , Chris Baines , Aifeng Wang , Xianhui Chen , Zbigniew Bukowski , Fazel Tafti

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Abstract

The magnetic properties of iron-based superconductors $A$ Fe $_2$ As $_2$ ( $A=$ K, Cs, and Rb), which are characterized by the V-shaped dependence of the critical temperature ( $T_{\rm c}$ ) on pressure ( $P$ ) were studied by means of the muon spin rotation/relaxation technique. In all three systems studied the magnetism was found to appear for pressures slightly below the critical one ( $P_{\rm c}$ ), i.e. at pressure where $T_{\rm c}(P)$ changes the slope. Rather than competing, magnetism and superconductivity in $A$ Fe $_2$ As $_2$ are coexisting at $P\gtrsim P_{\rm c}$ pressure region. Our results support the scenario of a transition from one pairing state to another, with different symmetries on either side of $P_{\rm c}$ .

Keywords

iron-based superconductors pressure-induced magnetism muon spin rotation critical temperature pairing symmetry coexistence

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@article{arxiv.2010.04448,
  title  = {Pressure-induced magnetism in iron-based superconductors $A$Fe$_2$As$_2$ ($A=$ K, Cs, Rb)},
  author = {Rustem Khasanov and Zurab Guguchia and Elvezio Morenzoni and Chris Baines and Aifeng Wang and Xianhui Chen and Zbigniew Bukowski and Fazel Tafti},
  journal= {arXiv preprint arXiv:2010.04448},
  year   = {2020}
}

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7 pages, 3 figures

Pressure-induced magnetism in iron-based superconductors $A$Fe$_2$As$_2$ ($A=$ K, Cs, Rb)

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