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Open Access Publications from the University of California

Fermiology and electron dynamics of trilayer nickelate La4Ni3O10

  • Author(s): Li, H
  • Zhou, X
  • Nummy, T
  • Zhang, J
  • Pardo, V
  • Pickett, WE
  • Mitchell, JF
  • Dessau, DS
  • et al.

© 2017 The Author(s). Layered nickelates have the potential for exotic physics similar to high TCsuperconducting 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 La4Ni3O10revealing 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-x2-y2dx2- y2orbital character, hole filling level, and strength of electronic correlations. However, in contrast to cuprates, La4Ni3O10has no pseudogap in the dx2-y2dx2- y2band, while it has an extra band of principally d3z2-r2d3z2- r2orbital 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.

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