Quasinested Fe orbitals versus Mott-insulating v orbitals in superconducting Sr2VFeAsO3 as seen from angle-resolved photoemission

T. Qian; N. Xu; Y. B. Shi; K. Nakayama; P. Richard; T. Kawahara; T. Sato; T. Takahashi; M. Neupane; Y. M. Xu; X. P. Wang; G. Xu; X. Dai; Z. Fang; P. Cheng; H. H. Wen; H. Ding

doi:10.1103/PhysRevB.83.140513

Quasinested Fe orbitals versus Mott-insulating v orbitals in superconducting Sr₂VFeAsO₃ as seen from angle-resolved photoemission

T. Qian, N. Xu, Y. B. Shi, K. Nakayama, P. Richard, T. Kawahara, T. Sato, T. Takahashi, M. Neupane, Y. M. Xu, X. P. Wang, G. Xu, X. Dai, Z. Fang, P. Cheng, H. H. Wen, H. Ding

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

We have performed an angle-resolved photoemission spectroscopy study of the iron-based superconductor (SC) Sr₂VFeAsO₃. While V 3d orbitals are found to be in a Mott-insulating state and show an incoherent peak at ∼1eV below the Fermi level, the dispersive Fe 3d bands form several hole- and electronlike Fermi surfaces (FSs), some of which are quasinested by the (π,0) wave vector. This differs from the local-density approximation (LDA) calculations, which predict non-nested FSs for this material. However, LDA + U with a large effective Hubbard energy U on V 3d electrons can reproduce the experimental observation reasonably well. The observed fermiology in SC Sr ₂VFeAsO₃ strongly supports that (π,0) interband scattering between quasinested FSs may play an important role for SC in pnictides.

Original language	English
Article number	140513
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	83
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.83.140513
Publication status	Published - 2011 Apr 29

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Qian, T., Xu, N., Shi, Y. B., Nakayama, K., Richard, P., Kawahara, T., Sato, T., Takahashi, T., Neupane, M., Xu, Y. M., Wang, X. P., Xu, G., Dai, X., Fang, Z., Cheng, P., Wen, H. H., & Ding, H. (2011). Quasinested Fe orbitals versus Mott-insulating v orbitals in superconducting Sr₂VFeAsO₃ as seen from angle-resolved photoemission. Physical Review B - Condensed Matter and Materials Physics, 83(14), [140513]. https://doi.org/10.1103/PhysRevB.83.140513

Quasinested Fe orbitals versus Mott-insulating v orbitals in superconducting Sr₂VFeAsO₃ as seen from angle-resolved photoemission. / Qian, T.; Xu, N.; Shi, Y. B.; Nakayama, K.; Richard, P.; Kawahara, T.; Sato, T.; Takahashi, T.; Neupane, M.; Xu, Y. M.; Wang, X. P.; Xu, G.; Dai, X.; Fang, Z.; Cheng, P.; Wen, H. H.; Ding, H.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 83, No. 14, 140513, 29.04.2011.

Research output: Contribution to journal › Article › peer-review

Qian, T, Xu, N, Shi, YB, Nakayama, K, Richard, P, Kawahara, T, Sato, T, Takahashi, T, Neupane, M, Xu, YM, Wang, XP, Xu, G, Dai, X, Fang, Z, Cheng, P, Wen, HH & Ding, H 2011, 'Quasinested Fe orbitals versus Mott-insulating v orbitals in superconducting Sr₂VFeAsO₃ as seen from angle-resolved photoemission', Physical Review B - Condensed Matter and Materials Physics, vol. 83, no. 14, 140513. https://doi.org/10.1103/PhysRevB.83.140513

Qian, T. ; Xu, N. ; Shi, Y. B. ; Nakayama, K. ; Richard, P. ; Kawahara, T. ; Sato, T. ; Takahashi, T. ; Neupane, M. ; Xu, Y. M. ; Wang, X. P. ; Xu, G. ; Dai, X. ; Fang, Z. ; Cheng, P. ; Wen, H. H. ; Ding, H. / Quasinested Fe orbitals versus Mott-insulating v orbitals in superconducting Sr₂VFeAsO₃ as seen from angle-resolved photoemission. In: Physical Review B - Condensed Matter and Materials Physics. 2011 ; Vol. 83, No. 14.

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abstract = "We have performed an angle-resolved photoemission spectroscopy study of the iron-based superconductor (SC) Sr2VFeAsO3. While V 3d orbitals are found to be in a Mott-insulating state and show an incoherent peak at ∼1eV below the Fermi level, the dispersive Fe 3d bands form several hole- and electronlike Fermi surfaces (FSs), some of which are quasinested by the (π,0) wave vector. This differs from the local-density approximation (LDA) calculations, which predict non-nested FSs for this material. However, LDA + U with a large effective Hubbard energy U on V 3d electrons can reproduce the experimental observation reasonably well. The observed fermiology in SC Sr 2VFeAsO3 strongly supports that (π,0) interband scattering between quasinested FSs may play an important role for SC in pnictides.",

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AU - Shi, Y. B.

AU - Nakayama, K.

AU - Richard, P.

AU - Kawahara, T.

AU - Sato, T.

AU - Takahashi, T.

AU - Neupane, M.

AU - Xu, Y. M.

AU - Wang, X. P.

AU - Xu, G.

AU - Dai, X.

AU - Fang, Z.

AU - Cheng, P.

AU - Wen, H. H.

AU - Ding, H.

PY - 2011/4/29

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N2 - We have performed an angle-resolved photoemission spectroscopy study of the iron-based superconductor (SC) Sr2VFeAsO3. While V 3d orbitals are found to be in a Mott-insulating state and show an incoherent peak at ∼1eV below the Fermi level, the dispersive Fe 3d bands form several hole- and electronlike Fermi surfaces (FSs), some of which are quasinested by the (π,0) wave vector. This differs from the local-density approximation (LDA) calculations, which predict non-nested FSs for this material. However, LDA + U with a large effective Hubbard energy U on V 3d electrons can reproduce the experimental observation reasonably well. The observed fermiology in SC Sr 2VFeAsO3 strongly supports that (π,0) interband scattering between quasinested FSs may play an important role for SC in pnictides.

AB - We have performed an angle-resolved photoemission spectroscopy study of the iron-based superconductor (SC) Sr2VFeAsO3. While V 3d orbitals are found to be in a Mott-insulating state and show an incoherent peak at ∼1eV below the Fermi level, the dispersive Fe 3d bands form several hole- and electronlike Fermi surfaces (FSs), some of which are quasinested by the (π,0) wave vector. This differs from the local-density approximation (LDA) calculations, which predict non-nested FSs for this material. However, LDA + U with a large effective Hubbard energy U on V 3d electrons can reproduce the experimental observation reasonably well. The observed fermiology in SC Sr 2VFeAsO3 strongly supports that (π,0) interband scattering between quasinested FSs may play an important role for SC in pnictides.

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