Metallic Néel order stabilized by coupling between inequivalent Hubbard layers
Abstract
Inspired by recent ARPES studies on multilayer (n≥3 layers) cuprate superconductors, we use the unrestricted Hartree-Fock approximation to explore the ground-state phase diagram of two coupled, inequivalently doped square-lattice Hubbard layers. In the decoupled-layer limit, the lightly hole-doped ground state is typically an incommensurate spin-stripe state. However, with sufficiently strong interlayer coupling, stripe order is destabilized relative to a commensurate Néel-ordered metal. The resulting state exhibits a reconstructed Fermi surface with hole pockets centered at (±π/2,±π/2) that are similar in character to those seen in experiments. Our results illustrate the qualitatively new physics that can arise from interlayer coupling in multilayer cuprates.
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BibTeX
@misc{wu2026metallic,
title = {{Metallic Néel order stabilized by coupling between inequivalent Hubbard layers}},
author = {Yi-Ming Wu and Jessica Yiqi Pan and Hong Yao and Steven A. Kivelson},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.20922},
eprint = {2609.20922},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.20922},
}
RIS
TY - UNPB
TI - Metallic Néel order stabilized by coupling between inequivalent Hubbard layers
AU - Yi-Ming Wu
AU - Jessica Yiqi Pan
AU - Hong Yao
AU - Steven A. Kivelson
PY - 2026
DA - 2026/09/17
PB - arXiv
DO - 10.48550/arxiv.2609.20922
UR - https://arxiv.org/abs/2609.20922
AB - Inspired by recent ARPES studies on multilayer (n≥3 layers) cuprate superconductors, we use the unrestricted Hartree-Fock approximation to explore the ground-state phase diagram of two coupled, inequivalently doped square-lattice Hubbard layers. In the decoupled-layer limit, the lightly hole-doped ground state is typically an incommensurate spin-stripe state. However, with sufficiently strong interlayer coupling, stripe order is destabilized relative to a commensurate Néel-ordered metal. The resulting state exhibits a reconstructed Fermi surface with hole pockets centered at (±π/2,±π/2) that are similar in character to those seen in experiments. Our results illustrate the qualitatively new physics that can arise from interlayer coupling in multilayer cuprates.
ER -