Erratum: Evidence for three-dimensional Fermi-surface topology of the layered electron-doped iron superconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Ba</mml:mi><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi mathvariant="normal">Fe</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">Co</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:mo>)</mml:mo></mm

Vilmercati, Paolo; Fedorov, A. V.; Vobornik, I.; Manju, U.; Panaccione, G.; Goldoni, A.; Sefat, Athena S.; McGuire, Michael A.; Sales, B. C.; Jin, Renxi; Mandrus, David; Singh, Deobrat; Mannella, Norman

doi:10.1103/physrevb.81.029901

Cited by 61 publications

(92 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, in Ba 0.1 K 0.9 Fe 2 As 2 , the superconducting gap size on all the Γ-centered hole Fermi surfaces does not vary much along k z [63]. This is consistent with the near two-dimensionality of KFe 2 As 2 by comparison with the other members of the 122 family [22,[64][65][66][67]. It is possible that, by applying pressure on KFe 2 As 2 , the pairing between the layers induces a k z modulation of the superconducting gap.…”

supporting

confidence: 73%

Upper critical field ofKFe2As2under pressure: A test for the change in the superconducting gap structure

et al. 2014

View full text Add to dashboard Cite

We report measurements of electrical resistivity under pressure to 5.8 GPa, magnetization to 6.7 GPa, and ac susceptibility to 7.1 GPa in KFe2As2. The previously reported change of slope in the pressure dependence of the superconducting transition temperature Tc(p) at a pressure p * ∼ 1.8 GPa is confirmed, and Tc(p) is found to be nearly constant above p * up to 7.1 GPa. The T -p phase diagram is very sensitive to the pressure conditions as a consequence of the anisotropic uniaxial pressure dependence of Tc. Across p * , a change in the behavior of the upper critical field is revealed through a scaling analysis of the slope of Hc 2 with the effective mass as determined from the A coefficient of the T 2 term of the temperature-dependent resistivity. We show that this scaling provides a quantitative test for the changes of the superconducting gap structure and suggests the development of a kz modulation of the superconducting gap above p * as a most likely explanation.

show abstract

supporting

confidence: 73%

Upper critical field ofKFe2As2under pressure: A test for the change in the superconducting gap structure

et al. 2014

View full text Add to dashboard Cite

show abstract

“…the ThCr 2 Si 2 structure materials, such as BaFe 2 As 2 . [35,36] This is a consequence of the fact that the (ThN) + sheets, although thinner than the (LaO) + sheets of LaFeAsO, are highly insulating.…”

Section: Resultsmentioning

confidence: 99%

ThFeAsN in relation to other iron-based superconductors

Singh

2016

Journal of Alloys and Compounds

View full text Add to dashboard Cite

The electronic structure, magnetic and structural properties of the superconductor ThFeAsN are discussed in relation to the Fe-pnictide and Fe-chalcogenide superconductors based on results of first principles calculations. The electronic structure is that of a high density of states semimetal. It shows approximately nested hole and electron Fermi surfaces of Fe d character involving the xz, yz and xy orbitals. There is a strong tendency towards magnetism at the GGA level, and this magnetism is important for describing the Fe-As bonding, but greatly overestimates the magnetic ordering. The lowest energy magnetic state at the GGA level is the stripe order, and this particular order couples strongly to electrons near E F . ThFeAsN is therefore strongly similar to the Fe-pnictide family of superconductors, although it is a particularly anisotropic member.

show abstract

“…Note that the band parity may be different from its main orbital character, because there are 2 inequivalent Fe in the unit cell [30,31]. The photon energy selects a particular k z value, which we estimate through the free electron final state approximation, already heavily used in iron pnictides [24,32,33].…”

Section: Methodsmentioning

confidence: 99%

ARPES view of orbitally resolved quasiparticle lifetimes in iron pnictides

et al. 2016

View full text Add to dashboard Cite

We study with ARPES the renormalization and quasiparticle lifetimes of the dxy and dxz/dyz orbitals in two iron pnictides, LiFeAs and Ba(Fe0.92Co0.08)2As2 [e.g. Co8]. We find that both quantities depend on orbital character rather than on the position on the Fermi Surface (for example hole or electron pocket). In LiFeAs, the renormalizations are larger for dxy, while they are similar on both types of orbitals in Co8. The most salient feature, which proved robust against all the ARPES caveats we could think of, is that the lifetimes for dxy exhibit a markedly different behavior than those for dxz/dyz. They have smaller values near EF and exhibit larger ω and temperature dependences. While the behavior of dxy is compatible with a Fermi liquid description, it is not the case for dxz/dyz. This situation should have important consequences for the physics of iron pnictides, which have not been considered up to now. More generally, it raises interesting questions on how a Fermi liquid regime can be established in a multiband system with small effective bandwidths.

show abstract

Erratum: Evidence for three-dimensional Fermi-surface topology of the layered electron-doped iron superconductorBa(Fe1−xCox)

Cited by 61 publications

References 0 publications

Upper critical field ofKFe2As2under pressure: A test for the change in the superconducting gap structure

Upper critical field ofKFe2As2under pressure: A test for the change in the superconducting gap structure

ThFeAsN in relation to other iron-based superconductors

ARPES view of orbitally resolved quasiparticle lifetimes in iron pnictides

Contact Info

Product

Resources

About