Orbital characters of three-dimensional Fermi surfaces in Eu2-xSrxNiO4 as probed by soft-x-ray angle-resolved photoemission spectroscopy

Uchida M, Ishizaka K, Hansmann P, Yang X, Sakano M, Miyawaki J, Arita R, Kaneko Y, Takata Y, Oura M, Toschi A, Held K, Chainani A, Andersen OK, Shin S, Tokura Y (2011)


Publication Type: Journal article

Publication year: 2011

Journal

Book Volume: 84

Article Number: ARTN 241109

Journal Issue: 24

DOI: 10.1103/PhysRevB.84.241109

Abstract

The three-dimensional Fermi-surface structure of hole-doped metallic layered nickelate Eu2-xSrxNiO4 (x = 1.1), an important counterpart to the isostructural superconducting cuprate La2-xSrxCuO4, is investigated by energy-dependent soft-x-ray angle-resolved photoemission spectroscopy. In addition to a large cylindrical hole Fermi surface analogous to the cuprates, we observe a Gamma-centered 3z(2) - r(2)-derived small electron pocket. This finding demonstrates that in the layered nickelate the 3z(2) - r(2) band resides close to the x(2) - y(2) one in energy. The resultant multiband feature with varying orbital character as revealed may strongly work against the emergence of the high-temperature superconductivity.

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APA:

Uchida, M., Ishizaka, K., Hansmann, P., Yang, X., Sakano, M., Miyawaki, J.,... Tokura, Y. (2011). Orbital characters of three-dimensional Fermi surfaces in Eu2-xSrxNiO4 as probed by soft-x-ray angle-resolved photoemission spectroscopy. Physical Review B, 84(24). https://doi.org/10.1103/PhysRevB.84.241109

MLA:

Uchida, Masaki, et al. "Orbital characters of three-dimensional Fermi surfaces in Eu2-xSrxNiO4 as probed by soft-x-ray angle-resolved photoemission spectroscopy." Physical Review B 84.24 (2011).

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