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Protection of correlation-induced phase instabilities by exceptional susceptibilities

, , , , , and . Phys. Rev. Res., 6 (2): L022031 (May 6, 2024)
DOI: 10.1103/PhysRevResearch.6.L022031

Abstract

At thermal equilibrium, generalized susceptibilities encoding the static physical response of Hermitian many-electron systems are shown to possess inherent non-Hermitian matrix symmetries, leading to the generic occurrence of exceptional points. In strongly correlated electron systems, such exceptional points are found to necessarily promote electronic charge instabilities that occur in the proximity of a Mott transition to a topologically robust phenomenon.

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Phys. Rev. Research 6, L022031 (2024) - Protection of correlation-induced phase instabilities by exceptional susceptibilities

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