Fermiology and electron dynamics of trilayer nickelate La4Ni3O10

Haoxiang Li, Xiaoqing Zhou, Thomas Nummy, Junjie Zhang, Victor Pardo, Warren E. Pickett, J. F. Mitchell and D. S. Dessau ()
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Haoxiang Li: University of Colorado at Boulder
Xiaoqing Zhou: University of Colorado at Boulder
Thomas Nummy: University of Colorado at Boulder
Junjie Zhang: Argonne National Lab
Victor Pardo: Universidade de Santiago de Compostela
Warren E. Pickett: University of California
J. F. Mitchell: Argonne National Lab
D. S. Dessau: University of Colorado at Boulder

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Layered nickelates have the potential for exotic physics similar to high TC superconducting cuprates as they have similar crystal structures and these transition metals are neighbors in the periodic table. Here we present an angle-resolved photoemission spectroscopy (ARPES) study of the trilayer nickelate La4Ni3O10 revealing its electronic structure and correlations, finding strong resemblances to the cuprates as well as a few key differences. We find a large hole Fermi surface that closely resembles the Fermi surface of optimally hole-doped cuprates, including its $$d_{x^2-y^2}$$ d x 2 - y 2 orbital character, hole filling level, and strength of electronic correlations. However, in contrast to cuprates, La4Ni3O10 has no pseudogap in the $$d_{x^2-y^2}$$ d x 2 - y 2 band, while it has an extra band of principally $$d_{3z^2-r^2}$$ d 3 z 2 - r 2 orbital character, which presents a low temperature energy gap. These aspects drive the nickelate physics, with the differences from the cuprate electronic structure potentially shedding light on the origin of superconductivity in the cuprates.

Date: 2017
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DOI: 10.1038/s41467-017-00777-0

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