Electronic properties, correlated topology, and Green's function zeros
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2024-09-03
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American Physical Society
Abstract
There is extensive current interest in electronic topology in correlated settings. In strongly correlated systems, contours of Green's function zeros may develop in frequency-momentum space, and their role in correlated topology has increasingly been recognized. However, whether and how the zeros contribute to electronic properties is a matter of uncertainty. Here we address the issue in an exactly solvable model for a Mott insulator. We show that the Green's function zeros contribute to several physically measurable correlation functions in a way that does not run into inconsistencies. In particular, the physical properties remain robust to chemical potential variations up to the Mott gap, as it should be based on general considerations. Our work sets the stage for further understandings of the rich interplay among topology, symmetry, and strong correlations.
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This article is published as Setty, Chandan, Fang Xie, Shouvik Sur, Lei Chen, Maia G. Vergniory, and Qimiao Si. "Electronic properties, correlated topology, and Green's function zeros." Physical Review Research 6, no. 3 (2024): 033235. doi: https://doi.org/10.1103/PhysRevResearch.6.033235.
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This open access article is published under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.