Dissimilarities between the electronic structure of chemically doped and chemically pressurized iron pnictides from an angle-resolved photoemission spectroscopy study

Abstract

We have studied the electronic structure of EuFe2As2-xPx using high resolution angle-resolved photoemission spectroscopy. Upon substituting As with the isovalent P, which leads to a chemical pressure and to superconductivity, we observe a non-rigid-band like change of the electronic structure along the center of the Brillouin zone (BZ): an orbital and kz dependent increase or decrease in the size of the hole pockets near the Gamma - Z line. On the other hand, the diameter of the Fermi surface cylinders at the BZ corner forming electron pockets, hardly changes. This is in stark contrast to p and n-type doped iron pnictides where, on the basis of ARPES experiments, a more rigid-band like behavior has been proposed. These findings indicate that there are different ways in which the nesting conditions can be reduced causing the destabilization of the antiferromagnetic order and the appearance of the superconducting dome.

arXiv comment5 pages, 3 figures

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• Coherent excitations and electron phonon coupling in Ba/EuFe_2As_2 compounds investigated by femtosecond time- and angle-resolved photoemission spectroscopy
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• Metal-chalcogen bond-length induced electronic phase transition from semiconductor to topological semimetal in ZrX${}_2$ (X = Se and Te)
• ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism
• Thermoelectric properties of iron-based superconductors and parent compounds
• Why $T_c$ of (CaFeAs)${}_{10}$Pt${}_{3.58}$As${}_8$ is twice as high as (CaFe${}_{0.95}$Pt${}_{0.05}$As)${}_{10}$Pt${}_3$As${}_8$
• Unique phase diagram with narrow superconducting dome in EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ due to Eu${}^{2+}$ local magnetic moments
• Signatures of quantum criticality in hole-doped and chemically pressurized EuFe_2As_2 single crystals
• Non-Fermi-liquid scattering rates and anomalous band dispersion in ferropnictides
• Experimental evidence for the importance of Hund's exchange interaction for the incoherence of the charge carriers in iron-based superconductors
• A weak-coupling superconductivity in the electron doped NaFe${}_{0.95}$Co${}_{0.05}$As is revealed by ARPES
• Kondo Destruction in Heavy Fermion Quantum Criticality and the Photoemission Spectrum of YbRh${}_2$Si${}_2$
• Electronic structure of CaFe2As2
• Electronic Nematicity Revealed by Torque Magnetometry in Iron Arsenide EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Electron spin resonance in Eu based Fe pnictides
• Influence of Lifshitz transitions and correlation effects on the scattering rates of the charge carriers in iron-based superconductors
• Angle-resolved photoemission spectroscopy observation of anomalous electronic states in EuFe${}_2$As${}_{2-x}$P${}_x$
• Electronic structure and ultrafast dynamics of FeAs-based superconductors by angle- and time-resolved photoemission spectroscopy
• Electronic structure and quantum criticality in Ba(Fe${}_{1-x-y}$Co${}_x$Mn${}_y$)${}_2$As${}_2$, an ARPES study
• Electronic Scattering Effects in Europium-Based Iron Pnictides
• Doping dependence and electron-boson coupling in the ultrafast relaxation of hot electron populations in Ba(Fe_{1-x}Co_x)_2As_2
• Experimental and theoretical electronic structure of EuRh2As2
• Electronic structure and $H$-$T$ phase diagram of Eu(Fe${}_{1-x}$Rh${}_x$)${}_2$As${}_2$