Pseudogap of Metallic Layered Nickelate R2-xSrxNiO4 (R = Nd, Eu) Crystals Measured Using Angle-Resolved Photoemission Spectroscopy
Uchida M, Ishizaka K, Hansmann P, Kaneko Y, Ishida Y, Yang X, Kumai R, Toschi A, Onose Y, Arita R, Held K, Andersen OK, Shin S, Tokura Y (2011)
Publication Type: Journal article
Publication year: 2011
Journal
Book Volume: 106
Article Number: ARTN 027001
Journal Issue: 2
DOI: 10.1103/PhysRevLett.106.027001
Abstract
We have investigated charge dynamics and electronic structures for single crystals of metallic layered nickelates, R2-xSrxNiO4 (R = Nd, Eu), isostructural to La2-xSrxCuO4. Angle-resolved photoemission spectroscopy on the barely metallic Eu0.9Sr1.1NiO4 (R = Eu, x = 1.1) has revealed a large hole surface of x(2) - y(2) character with a high-energy pseudogap of the same symmetry and comparable magnitude with those of underdoped (x < 0.1) cuprates, although the antiferromagnetic interactions are 1 order of magnitude smaller. This finding strongly indicates that the momentum-dependent pseudogap feature in the layered nickelate arises from the real-space charge correlation.
Authors with CRIS profile
Involved external institutions
University of Tokyo
Japan (JP)
Technische Universität Wien / Vienna University of Technology
Austria (AT)
Max-Planck-Institut für Festkörperforschung
Germany (DE)
National Institute of Advanced Industrial Science and Technology / 産業技術総合研究所 (AIST)
Japan (JP)
Japan Science and Technology Agency
Japan (JP)
Japan (JP)
Technische Universität Wien / Vienna University of Technology
Austria (AT)
Max-Planck-Institut für Festkörperforschung
Germany (DE)
National Institute of Advanced Industrial Science and Technology / 産業技術総合研究所 (AIST)
Japan (JP)
Japan Science and Technology Agency
Japan (JP)
How to cite
APA:
Uchida, M., Ishizaka, K., Hansmann, P., Kaneko, Y., Ishida, Y., Yang, X.,... Tokura, Y. (2011). Pseudogap of Metallic Layered Nickelate R2-xSrxNiO4 (R = Nd, Eu) Crystals Measured Using Angle-Resolved Photoemission Spectroscopy. Physical Review Letters, 106(2). https://dx.doi.org/10.1103/PhysRevLett.106.027001
MLA:
Uchida, Masaki, et al. "Pseudogap of Metallic Layered Nickelate R2-xSrxNiO4 (R = Nd, Eu) Crystals Measured Using Angle-Resolved Photoemission Spectroscopy." Physical Review Letters 106.2 (2011).
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