Fermi surfaces and quasi-particle band dispersions of the iron pnictides superconductor KFe2As2 observed by angle-resolved photoemission spectroscopy

T. Yoshida; I. Nishi; A. Fujimori; M. Yi; R. G. Moore; D. H. Lu; Z. X. Shen; K. Kihou; P. M. Shirage; H. Kito; C. H. Lee; A. Iyo; H. Eisaki; H. Harima

doi:10.1016/j.jpcs.2010.10.064

Fermi surfaces and quasi-particle band dispersions of the iron pnictides superconductor KFe₂As₂ observed by angle-resolved photoemission spectroscopy

T. Yoshida, I. Nishi, A. Fujimori, M. Yi, R. G. Moore, D. H. Lu, Z. X. Shen, K. Kihou, P. M. Shirage, H. Kito, C. H. Lee, A. Iyo, H. Eisaki, H. Harima

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47 Scopus citations

Abstract

We have performed an angle-resolved photoemission study of the iron pnictide superconductor KFe₂As₂ with T_c∼4K. Most of the observed Fermi surfaces show almost two-dimensional shapes, while one of the quasi-particle bands near the Fermi level has a strong dispersion along the k_z direction, consistent with the result of a band-structure calculation. However, hole Fermi surfaces α and ζ are smaller than those predicted by the calculation while other Fermi surfaces are larger. These observations are consistent with the result of a de Haasvan Alphen study and a theoretical prediction on inter-band scattering, possibly indicating many body effects on the electronic structure.

Original language	English
Pages (from-to)	465-468
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	72
Issue number	5
DOIs	https://doi.org/10.1016/j.jpcs.2010.10.064
State	Published - May 2011
Externally published	Yes

Funding

We are grateful to H. Fukazawa, T. Terashima and M. Kimata for enlightening discussions. This work was supported by Transformative Research-Project on Iron Pnictides (TRIP) from the Japan Science and Technology Agency, and the Japan-China-Korea A3 Foresight Program from the Japan Society for the Promotion of Science. SSRL is operated by the US DOE Office of Basic Energy Science Divisions of Chemical Sciences and Material Sciences.

Funders	Funder number
Basic Energy Science Divisions of Chemical Sciences and Material Sciences
Japan Society for the Promotion of Science
Japan Science and Technology Agency

Keywords

D. Electronic structure

Access to Document

10.1016/j.jpcs.2010.10.064

Cite this

Yoshida, T., Nishi, I., Fujimori, A., Yi, M., Moore, R. G., Lu, D. H., Shen, Z. X., Kihou, K., Shirage, P. M., Kito, H., Lee, C. H., Iyo, A., Eisaki, H., & Harima, H. (2011). Fermi surfaces and quasi-particle band dispersions of the iron pnictides superconductor KFe₂As₂ observed by angle-resolved photoemission spectroscopy. Journal of Physics and Chemistry of Solids, 72(5), 465-468. https://doi.org/10.1016/j.jpcs.2010.10.064

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abstract = "We have performed an angle-resolved photoemission study of the iron pnictide superconductor KFe2As2 with Tc∼4K. Most of the observed Fermi surfaces show almost two-dimensional shapes, while one of the quasi-particle bands near the Fermi level has a strong dispersion along the kz direction, consistent with the result of a band-structure calculation. However, hole Fermi surfaces α and ζ are smaller than those predicted by the calculation while other Fermi surfaces are larger. These observations are consistent with the result of a de Haasvan Alphen study and a theoretical prediction on inter-band scattering, possibly indicating many body effects on the electronic structure.",

keywords = "D. Electronic structure",

author = "T. Yoshida and I. Nishi and A. Fujimori and M. Yi and Moore, {R. G.} and Lu, {D. H.} and Shen, {Z. X.} and K. Kihou and Shirage, {P. M.} and H. Kito and Lee, {C. H.} and A. Iyo and H. Eisaki and H. Harima",

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Yoshida, T, Nishi, I, Fujimori, A, Yi, M, Moore, RG, Lu, DH, Shen, ZX, Kihou, K, Shirage, PM, Kito, H, Lee, CH, Iyo, A, Eisaki, H & Harima, H 2011, 'Fermi surfaces and quasi-particle band dispersions of the iron pnictides superconductor KFe₂As₂ observed by angle-resolved photoemission spectroscopy', Journal of Physics and Chemistry of Solids, vol. 72, no. 5, pp. 465-468. https://doi.org/10.1016/j.jpcs.2010.10.064

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AU - Yoshida, T.

AU - Nishi, I.

AU - Fujimori, A.

AU - Yi, M.

AU - Moore, R. G.

AU - Lu, D. H.

AU - Shen, Z. X.

AU - Kihou, K.

AU - Shirage, P. M.

AU - Kito, H.

AU - Lee, C. H.

AU - Iyo, A.

AU - Eisaki, H.

AU - Harima, H.

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AB - We have performed an angle-resolved photoemission study of the iron pnictide superconductor KFe2As2 with Tc∼4K. Most of the observed Fermi surfaces show almost two-dimensional shapes, while one of the quasi-particle bands near the Fermi level has a strong dispersion along the kz direction, consistent with the result of a band-structure calculation. However, hole Fermi surfaces α and ζ are smaller than those predicted by the calculation while other Fermi surfaces are larger. These observations are consistent with the result of a de Haasvan Alphen study and a theoretical prediction on inter-band scattering, possibly indicating many body effects on the electronic structure.

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