Angle-resolved photoemission spectroscopy study on iron-based superconductors

Zi-Rong, Ye; Zhang, Yan; Bin-Ping, Xie; Feng, Donglai

doi:10.1088/1674-1056/22/8/087407

Cited by 21 publications

(19 citation statements)

References 75 publications

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“…Here we need to emphasize that, our theoretical model is applicable to both the 111 and 122 phases. As indicated by the ARPES experiments 47 , in LiFeAs and BaFe 2 As 2 , the sizes of the electron and hole pockets are comparable.…”

Section: 52mentioning

confidence: 59%

Localization and orbital selectivity in iron-based superconductors with Cu substitution

Liu

Wang

et al. 2015

Phys. Rev. B

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We study an inhomogeneous three-orbital Hubbard model for the Cu-substituted iron pnictides using an extended real-space Green's function method combined with density functional calculations. We find that the onsite interactions of the Cu ions are the principal determinant of whether an electron dopant or a hole dopant is caused by the Cu substitution. It is found that the Cu substitution could lead to a hole doping when its onsite interactions are smaller than a critical value, as opposed to an electron doping when the interactions of Cu ions are larger than the critical value, which may explain why the effects of Cu substitution on the carrier density are entirely different in NaFe1−xCuxAs and Ba(Fe1−xCux)2As2. We also find that the effect of a doping-induced disorder is considerable in the Cu-substituted iron pnictides, and its cooperative effect with electron correlations contributes to the orbital-selective insulating phases in NaFe1−xCuxAs and Ba(Fe1−xCux)2As2.

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Section: 52mentioning

confidence: 59%

Localization and orbital selectivity in iron-based superconductors with Cu substitution

Liu

Wang

et al. 2015

Phys. Rev. B

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“…The basics of ARPES have been described in detail elsewhere [8][9][10][96][97][98][99][100] . In the following section, we provide a brief introduction to salient points that are useful in understanding ARPES studies of topological materials.…”

Section: Fundamentals Of Arpesmentioning

confidence: 99%

Angle-resolved photoemission spectroscopy and its application to topological materials

2019

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“…Consistently, in LiFe 1−x Co x As and Ba(Fe 1 −x Co x ) 2 As 2 , when the d xz /d yz hole pockets vanish with electron doping, superconductivity is strongly suppressed. 75,76 On the contrary, for heavily electron-doped iron-selenide superconductors with only electron pockets, the superconducting gap of 1 mL FeSe film show maxima on the d xy electron bands. 69 Furthermore, in bulk FeSe crystal, where the sample is continuously surface-doped to enhance superconductivity, it is reported that the appearance of the d xy electron pocket on the Fermi surface at the M point coincides with the beginning of the second superconducting dome with higher T C and different pairing symmetry.…”

Section: The Spin-density Wave Ordermentioning

confidence: 99%

Role of the orbital degree of freedom in iron-based superconductors

et al. 2017

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Almost a decade has passed since the serendipitous discovery of the iron-based high temperature superconductors (FeSCs) in 2008. The fact that, as in the copper oxide high temperature superconductors, long-range antiferromagnetism in the FeSCs arises in proximity to superconductivity immediately raised the question of the degree of similarity between the two. Despite the great resemblance in their phase diagrams, there exist important differences between the FeSCs and the cuprates that need to be considered in order to paint a full picture of these two families of high temperature superconductors. One of the key differences is the multi-orbital multi-band nature of the FeSCs, which contrasts with the effective single-band nature of the cuprates. Systematic studies of orbital related phenomena in FeSCs have been largely lacking. In this review, we summarize angle-resolved photoemission spectroscopy (ARPES) measurements across various FeSC families that have been reported in literature, focusing on the systematic trends of orbital dependent electron correlations and the role of different Fe 3d orbitals in driving the nematic transition, the spin-density-wave transition, and superconductivity.

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Angle-resolved photoemission spectroscopy study on iron-based superconductors

Cited by 21 publications

References 75 publications

Localization and orbital selectivity in iron-based superconductors with Cu substitution

Localization and orbital selectivity in iron-based superconductors with Cu substitution

Angle-resolved photoemission spectroscopy and its application to topological materials

Role of the orbital degree of freedom in iron-based superconductors

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