Inhomogeneous metallic phase upon disordering a two dimensional Mott insulator

Abstract

We find that isoelectronic disorder destroys the spectral gap in a Mott-Hubbard insulator in 2D leading, most unexpectedly, to a new metallic phase. This phase is spatially inhomogeneous with metallic behavior coexisting with antiferromagnetic long range order. Even though the Mott gap in the pure system is much larger than antiferromagnetic exchange, the spectral gap is destroyed locally in regions where the disorder potential is high enough to overcome the inter-electron repulsion thereby generating puddles where charge fluctuations are enhanced. With increasing disorder, these puddles expand and concomitantly the states at the Fermi energy get extended leading to a metallic phase. We discuss the implications of our results for experiments.

(4 pages, 5 figures)

References in corpus (3)

• Disorder Screening in Strongly Correlated Systems
• Localization effects and inelastic scattering in disordered heavy electrons
• Temperature dependent transport of correlated disordered electrons: elastic vs. inelastic scattering

Cited by in corpus (49)

• A metallic mosaic phase and the origin of Mott insulating state in 1T-TaS2
• Nanoscale manipulation of the Mott insulating state coupled to charge order in 1T-TaS2
• Generalized Inverse Participation Ratio as a Possible Measure of Localization for Interacting Systems
• Glassy behavior in a binary atomic mixture
• Emergent Novel Metallic State in a Disordered 2D Mott Insulator
• Competition between Anderson localization and antiferromagnetism in correlated lattice fermion systems with disorder
• Dynamical Mean Field Study of the Two-Dimensional Disordered Hubbard Model
• Single-particle excitations under coexisting electron correlation and disorder: a numerical study of the Anderson-Hubbard model
• Anderson localization vs. Mott-Hubbard metal-insulator transition in disordered, interacting lattice fermion systems
• Soft Hubbard gaps in disordered itinerant models with short-range interaction
• Carrier localization and electronic phase separation in a doped spin-orbit driven Mott phase in Sr3(Ir1-xRux)2O7
• Spin-orbit-controlled metal-insulator transition in Sr${}_2$IrO${}_4$
• Metal-insulator transition from combined disorder and interaction effects in Hubbard-like electronic lattice models with random hopping
• Semiclassical dynamics of spin density waves
• Disorder induced power-law gaps in an insulator-metal Mott transition
• Non Fermi liquid behavior and continuously tunable resistivity exponents in the Anderson-Hubbard model at finite temperature
• Anderson localization effects near the Mott metal-insulator transition
• Influence of disorder on incoherent transport near the Mott transition
• The role of strong electronic correlations in the metal-to-insulator transition in disordered LiAl_yTi_(2-y)O_4
• Ground-state properties of the disordered Hubbard model in two dimensions
• Machine learning electron correlation in a disordered medium
• Finite-temperature phase diagram of nonmagnetic impurities in high-temperature superconductors using a d=3 tJ model with quenched disorder
• Correlated electrons in the presence of disorder
• Self-consistent study of Anderson localization in the Anderson-Hubbard model in two and three dimensions
• The two-dimensional disordered Mott metal-insulator transition
• Local moments and magnetic order in the two-dimensional Anderson-Mott transition
• Competition between disorder and Coulomb interaction in a two-dimensional plaquette Hubbard model
• Local Spectroscopies Reveal Percolative Metal in Disordered Mott Insulators
• Ingredients for Generalized Models of $\kappa$-Phase Organic Charge-Transfer Salts: A Review
• Interacting Fermi Gases in Disordered One-Dimensional Lattices
• Machine learning predictions for local electronic properties of disordered correlated electron systems
• Static Screening and Delocalization Effects in the Hubbard-Anderson Model
• Physical mechanism for a kinetic energy driven zero-bias anomaly in the Anderson-Hubbard model
• Interacting lattice electrons with disorder in two dimensions: Numerical evidence for a metal-insulator transition with a universal critical conductivity
• Energy-resolved spatial inhomogeneity of disordered Mott systems
• Overdamped antiferromagnetic strange metal state in Sr${}_3$IrRuO${}_7$
• Analysis of the Disorder-Induced Zero Bias Anomaly in the Anderson-Hubbard Model
• Thermodynamics of the disordered Hubbard model studied via numerical linked-cluster expansions
• Magnetic properties of interacting, disordered electron systems in d=2 dimensions
• Strong-coupling perturbative study of the disordered Hubbard model on honeycomb lattice
• Phase transitions in the binary-alloy Hubbard model: insight from strong-coupling perturbation theory
• Optical conductivity of a metal-insulator transition for the Anderson-Hubbard model in 3 dimensions away from 1/2 filling
• Dimensional and temperature dependence of metal insulator transition in correlated and disordered systems
• Critiquing Variational Theories of the Anderson-Hubbard Model: Real-Space Self-Consistent Hartree-Fock Solutions
• Universal properties of single particle excitations across the many-body localization transition
• Non-Gaussian Spatial Correlations Dramatically Weaken Localization
• Transport and spectroscopic signatures of a disorder-stabilized metal in two-dimensional frustrated Mott insulators
• Binding carriers to a non-magnetic impurity in a two-dimensional square Ising antiferromagnet
• Anderson localization: a density matrix approach