Finite-Temperature Charge Dynamics and the Melting of the Mott Insulator

Abstract

The Mott insulator is the quintessential strongly correlated electronic state. We obtain complete insight into the physics of the two-dimensional Mott insulator by extending the slave-fermion (holon-doublon) description to finite temperatures. We first benchmark its predictions against state-of-the-art quantum Monte Carlo simulations, demonstrating quantitative agreement. Qualitatively, the short-ranged spin fluctuations both induce holon-doublon bound states and renormalize the charge sector to form the Hubbard bands. The Mott gap is understood as the charge gap renormalized downwards by these spin fluctuations. As temperature increases, the Mott gap closes before the charge gap, causing a pseudogap regime to appear naturally during the melting of the Mott insulator.

12 pages, 10 figures

References in corpus (10)

• Two Gaps Make a High Temperature Superconductor?
• Cluster Dynamical Mean Field Theory of the Mott Transition
• Fluctuation diagnostics of the electron self-energy: Origin of the pseudogap physics
• Nearly deconfined spinon excitations in the square-lattice spin-1/2 Heisenberg antiferromagnet
• Mott Transitions and d-wave Superconductivity in Half-Filled-Band Hubbard Model on Square Lattice with Geometric Frustration
• Finite doping signatures of the Mott transition in the two-dimensional Hubbard model
• Topological order in the pseudogap metal
• Antiferromagnetism and single-particle properties in the two-dimensional half-filled Hubbard model: a non-linear sigma model approach
• Relationship between the parent charge transfer gap and maximum transition temperature in cuprates
• Néel transition of lattice fermions in a harmonic trap: a real-space DMFT study

Cited by in corpus (7)

• Quantum Many-Body Simulations of the 2D Fermi-Hubbard Model in Ultracold Optical Lattices
• Renormalization of the Mott gap by lattice entropy: The case of 1T-TaS2
• Dynamic charge Kondo effect and a slave fermion approach to the Mott transition
• Slave fermion interpretation of the pseudogap in doped Mott insulators
• Mott Gap Softening Coinciding with Spin Correlations Collapse in a-RuCl3
• Evidence of Mott Insulator with Thermally Induced Melting Behavior in Kagome Compound Nb3Cl8
• Ultrafast charge-transfer dynamics in Ca${}_2$CuO${}_2$Cl${}_2$ from time-resolved optical reflectivity