Topic Review: Hatsugai-Kohmoto models: Exactly solvable playground for Mottness and Non-Fermi Liquid

Abstract

This pedagogic review aims to give a gentle introduction to an exactly solvable model, the Hatsugai-Kohmoto (HK) model, which has infinite-ranged interaction but conserves the center of mass. Although this model is invented in 1992, intensive studies on its properties ranging from unconventional superconductivity, topological ordered states to non-Fermi liquid behaviors are made since 2020. We focus on its emergent non-Fermi liquid behavior and provide discussion on its thermodynamics, single-particle and two-particle correlation functions. Perturbation around solvable limit has also been explored with the help of perturbation theory, renormalization group and exact diagonalization calculation. We hope the present review will be helpful for graduate students or researchers interested in HK-like models or more generic strongly correlated electron systems.

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Cited by in corpus (5)

• Enhanced Superconducting Diode Effect in the Asymmetric Hatsugai-Kohmoto Model
• Infinite temperature spin dynamics in the asymmetric Hatsugai-Kohmoto model
• Exact analysis of the interplay of charge order and unconventional pairings in the 2D Hatsugai-Kohmoto model
• Interaction enhanced altermagnet in the Hatsugai-Kohmoto model
• Quantized and nonquantized Hall response in topological Hatsugai-Kohmoto systems