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Fig. 1 Attractive interaction between a doublon and a holon due to antiferromagnetic exchange interactions in half-filled 2D Mott insulators. Attractive interaction between a doublon and a holon due to antiferromagnetic exchange interactions in half-filled 2D Mott insulators. (A) Ground state. (B) A pair of a doublon (D) and a holon (H) apart from each other. The energy increase of the spin sector is +8J. (C) A pair of a doublon and a holon located at two neighboring sites. The energy increase of the spin sector is +7J, which is smaller than that in (B). T. Terashige et al. Sci Adv 2019;5:eaav2187 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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