Electronic structure of EuFe<sub>2</sub>As<sub>2</sub>

Adhikary, Ganesh; Sahadev, Nishaina; Biswas, Deepnarayan; Bindu, R.; Kumar, Neeraj; Thamizhavel, A.; Dhar, S. K.; Maiti, Kalobaran

doi:10.1088/0953-8984/25/22/225701

Cited by 24 publications

(22 citation statements)

References 35 publications

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“…The large intensity of the α-band in the He II-spectra and its reduction with respect to the intensity of (β, γ)-bands in the He I spectra sug- gests larger As 4p-contribution in (β, γ)-bands relative to that in the α-band. This behavior is consistent with the observation in other compounds in the same class of materials 17 . The influence of the matrix element is also evident in the energy distribution curves (EDCs) shown in Figs.…”

Section: (D)supporting

confidence: 93%

Complex temperature evolution of the electronic structure of CaFe2As2

Adhikary

Biswas

Sahadev

et al. 2014

Journal of Applied Physics

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We investigate the electronic structure of CaFe 2 As 2 using high resolution photoemission spectroscopy. Experimental results exhibit three energy bands crossing the Fermi level making hole pockets around the Γ-point. Temperature variation reveal a gradual shift of an energy band away from the Fermi level with the decrease in temperature in addition to the spin density wave (SDW) transition induced Fermi surface reconstruction of the second energy band across SDW transition temperature. The hole pocket in the former case eventually disappears at lower temperatures while the hole Fermi surface of the third energy band possessing finite p orbital character survives till the lowest temperature studied. These results reveal signature of a complex charge redistribution among various energy bands as a function of temperature that might be associated to the exotic properties of this system.

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Section: (D)supporting

confidence: 93%

Complex temperature evolution of the electronic structure of CaFe2As2

Adhikary

Biswas

Sahadev

et al. 2014

Journal of Applied Physics

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“…In the 122 family of compounds, AFe 2 As 2 (A=Ba, Ca, Sr, Eu) have stimulated high interest in research since they are easier to synthesize [11]. EuFe As 2 2 is unique in the 122 family since the Eu atom undergoes Spin Density Wave and Antiferromagnetic ordering magnetic transitions, leading to antiferromagnetic ground state [12,13]. Other compounds in the 122 Iron Pnictide family include BaFe 2 As 2 and CaFe 2 As 2 , which have a relatively similar structure to that of EuFe 2 As 2 [14].…”

Section: Introductionmentioning

confidence: 99%

Structural and electronic properties of the iron pnictide compound EuFe₂As₂ from first principles

Omboga

Otieno

2020

J. Phys. Commun.

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We report results of the electronic and mechanical structure properties of the iron pnictide compound EuFe 2 As 2 , at zero pressure. The open source computer code Quantum Espresso, which incorporates the Density Functional Theory (DFT), Pseudo Potentials (PP) and the Plane Wave (PW) were used to perform calculations from first principles. Projector-Augmented Wave (PAW) Pseudo Potentials were used in these calculations. The Density of States exhibits a sizeable superconducting gap and the band structure has no bandgap. Calculations were performed from scratch.

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“…Interestingly, many of these Fe-based compounds exhibit pressure-induced superconductivity [5,6], although application of pressure usually renormalizes the hopping interaction strengths due to the compression/distortion of the real lattice without significant change in the overall carrier concentration. Most interestingly, some Fe-based compounds exhibit unusual coexistence of magnetic order and superconductivity [6,7].…”

Section: Introductionmentioning

confidence: 99%

Electronic structure of Fe-based superconductors

Maiti

2015

Pramana - J Phys

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Fe-based superconductors have drawn much attention during the last decade due to the presence of superconductivity in materials containing the magnetic element, Fe, and the coexistence of superconductivity and magnetism. Extensive study of the electronic structure of these systems suggested the dominant role of d states in their electronic properties, which is significantly different from the cuprate superconductors. In this article, some of our studies of the electronic structure of these fascinating systems employing high-resolution photoemission spectroscopy is reviewed. The combined effect of electron correlation and covalency reveals an interesting scenario in their electronic structure. The contribution of ligand p states at the Fermi level is found to be much more significant than indicated in earlier studies. Temperature evolution of the energy bands reveals the signature of transition akin to Lifshitz transition in these systems.

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Electronic structure of EuFe₂As₂

Cited by 24 publications

References 35 publications

Complex temperature evolution of the electronic structure of CaFe2As2

Complex temperature evolution of the electronic structure of CaFe2As2

Structural and electronic properties of the iron pnictide compound EuFe₂As₂ from first principles

Electronic structure of Fe-based superconductors

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Electronic structure of EuFe2As2

Cited by 24 publications

References 35 publications

Complex temperature evolution of the electronic structure of CaFe2As2

Complex temperature evolution of the electronic structure of CaFe2As2

Structural and electronic properties of the iron pnictide compound EuFe2As2 from first principles

Electronic structure of Fe-based superconductors

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Product

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Electronic structure of EuFe₂As₂

Structural and electronic properties of the iron pnictide compound EuFe₂As₂ from first principles