Publisher's Note: Emergence of the nematic electronic state in FeSe [Phys. Rev. B<b>91</b>, 155106 (2015)]

Watson, M. D.; Kim, T. K.; Haghighirad, Amir-Abbas; Davies, N. R.; McCollam, A.; Narayanan, A.; Blake, S. F.; Chen, Y. L.; Ghannadzadeh, Saman; Schofield, A. J.; Hoesch, Moritz; Meingast, C.; Wolf, Thomas; Coldea, A. I.

doi:10.1103/physrevb.91.199905

Cited by 93 publications

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“…We found that the dissipation of a shallow hole pocket occurs owing to the orbital dependence of on-site Coulomb interaction, in agreement with the orbitaldependent band lifting observed by the recent ARPES and QO experiments. 27,28) We also found that the intersite orbitalpolarization Coulomb interaction between the Fe d orbital and Se p orbital drives an electric orbital order in the absence of a low-energy commensurate spin response.…”

Section: Summary and Discussionmentioning

confidence: 66%

“…Above T s (at a high temperature), ARPES experiments [27][28][29][30] found that hole Fermi surfaces consist of two small pockets of mainly d zx and d yz character around the Γ-Z line. A narrow d xy hole band also exists in ∼50 meV below the Fermi level.…”

Section: Introductionmentioning

confidence: 99%

“…The larger Coulomb interaction yields larger mass enhancement with significant orbital dependence. 44,45) However, the origin of unusual electronic states observed in experiments 27,28) has been a controversial issue.…”

Section: Introductionmentioning

confidence: 99%

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Fermi Surface, Pressure-Induced Antiferromagnetic Order, and Superconductivity in FeSe

et al. 2018

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The pressure dependence of the structural (Ts), antiferromagnetic (Tm), and superconducting (Tc) transition temperatures in FeSe is investigated on the basis of the 16-band d-p model. At ambient pressure, a shallow hole pocket disappears due to the correlation effect, as observed in the angular-resolved photoemission spectroscopy (ARPES) and quantum oscillation (QO) experiments, resulting in the suppression of the antiferromagnetic order, in contrast to the other iron pnictides. The orbital-polarization interaction between the Fe d orbital and Se p orbital is found to drive the ferro-orbital order responsible for the structural transition without accompanying the antiferromagnetic order. The pressure dependence of the Fermi surfaces is derived from the first-principles calculation and is found to well account for the opposite pressure dependences of Ts and Tm, around which the enhanced orbital and magnetic fluctuations cause the double-dome structure of the eigenvalue λ in the Eliashberg equation, as consistent with that of Tc in FeSe.

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Section: Summary and Discussionmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

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Fermi Surface, Pressure-Induced Antiferromagnetic Order, and Superconductivity in FeSe

et al. 2018

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“…To answer this question, the strong in-plane anisotropy of transport coefficients has been studied intensively as a key electronic property in the nematic state [2,[15][16][17][18][19][20][21][22][23][24]. In Ba(Fe 1−x Co x ) 2 As 2 , Ba(As 1−x P x ) 2 and EuFe 2 (As 1−x P x ) 2 , large C 2 anisotropy in the resistivity ρ ≡ ρ x − ρ y < 0 appears in detwinned samples below T S , where ρ μ is the resistivity along the μ axis [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

In-plane anisotropy of transport coefficients in electronic nematic states: Universal origin of nematicity in Fe-based superconductors

Onari

Kontani

2017

Phys. Rev. B

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The origin of the electronic nematicity and its remarkable material dependence are famous longstanding unsolved issues in Fe-based superconductors. To attack these issues, we focus on the in-plane anisotropy of the resistivity: In the nematic state in FeSe, the relation ρ x > ρ y holds, where ρ x(y) is the resistivity along the longer (shorter) Fe-Fe axis. In contrast, the opposite anisotropy ρ x < ρ y is realized in other undoped Fe-based superconductors. Such nontrivial material dependence is naturally explained in terms of the strongly orbitaldependent inelastic quasiparticle scattering realized in the orbital-ordered state. The opposite anisotropy between FeSe (ρ x > ρ y ) and other undoped compounds (ρ x < ρ y ) reflects the difference in the number of hole pockets. We also explain the large in-plane anisotropy of the thermoelectric power in the nematic state.

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“…Yet despite its importance in the semiconductor industry, 1 elastoresistivity has only recently been exploited as a probe of broken symmetry in the field of strongly correlated electron systems. [2][3][4][5][6] Since the electrons in these materials are often strongly coupled to the crystal lattice as compared to simple metals, and because transport measurements are sensitive to long wavelength electronic excitations at the Fermi level, elastoresistivity is a potentially valuable tool in elucidating the nature of broken symmetries in these complex systems. 7 By measuring the temperature dependence of the inplane elastoresistance, recent experiments have probed the nematic susceptibility of a series of iron-pnictide [2][3][4] and heavy fermion 5 superconductors, signaling in both cases the nematic character of the fluctuations associated with the underlying order parameter.…”

Section: Introductionmentioning

confidence: 99%

Symmetry constraints on the elastoresistivity tensor

et al. 2015

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The elastoresistivity tensor m ij,kl characterizes changes in a material's resistivity due to strain. As a fourth-rank tensor, elastoresistivity can be a uniquely useful probe of the symmetries and character of the electronic state of a solid. We present a symmetry analysis of m ij,kl (both in the presence and absence of a magnetic field) based on the crystalline point group, focusing for pedagogic purposes on the D 4h point group (of relevance to several materials of current interest). We also discuss the relation between m ij,kl and various thermodynamic susceptibilities, particularly where they are sensitive to critical fluctuations proximate to a critical point at which a point group symmetry is spontaneously broken.

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Publisher's Note: Emergence of the nematic electronic state in FeSe [Phys. Rev. B91, 155106 (2015)]

Cited by 93 publications

References 0 publications

Fermi Surface, Pressure-Induced Antiferromagnetic Order, and Superconductivity in FeSe

Fermi Surface, Pressure-Induced Antiferromagnetic Order, and Superconductivity in FeSe

In-plane anisotropy of transport coefficients in electronic nematic states: Universal origin of nematicity in Fe-based superconductors

Symmetry constraints on the elastoresistivity tensor

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