Orbital Magnetic Field Driven Metal-Insulator Transition in Strongly Correlated Electron Systems

Abstract

We study the effects of an orbital magnetic field on the Mott metal-insulator transition in the Hubbard-Hofstadter model. We demonstrate that sufficiently large magnetic fields induce a Mott insulator-to-metal phase transition supporting our claim with dynamical mean field theory (DMFT) numerical results. For both competing phases (metal and insulator) we observe a magnetic-fieldinduced metallization reflected in an enhancement of kinetic and potential energy. The kinetic energy of the Mott insulator increases due to the Aharonov-Bohm effect experienced by electrons virtually tunneling around an elementary plaquette which is, however, suppressed by strong correlations. The kinetic energy of the metallic phase, on the other hand, is more strongly affected by the magnetic field through a field-driven redistribution of spectral weight due to the formation of magnetic minibands. This leads to an increase of the kinetic energy which tends to stabilize the metallic state. Our theoretical results might be relevant for recent experimental studies on magnetic field driven insulator-to-metal transitions in strongly correlated materials such as VO2, $\lambda$-type organic conductors and moiré multilayers.

References in corpus (31)

• Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• An efficient, multiple range random walk algorithm to calculate the density of states
• Anderson Transitions
• Fate of the false Mott-Hubbard transition in two dimensions
• w2dynamics: Local one- and two-particle quantities from dynamical mean field theory
• Nevanlinna Analytical Continuation
• Strong-Coupling Perturbation Theory of the Hubbard Model
• Static vs. dynamical mean field theory of Mott antiferromagnets
• Large-$U$ limit of a Hubbard model in a magnetic field: chiral spin interactions and paramagnetism
• Antiferromagnetism and the gap of a Mott insulator: Results from analytic continuation of the self-energy
• Strong-Coupling Expansion for the Hubbard Model
• Field-driven Mott gap collapse and resistive switch in correlated insulators
• Cascades between light and heavy fermions in the normal state of magic angle twisted bilayer graphene
• Magnetic-field-induced insulator-metal transition in W-doped VO2 at 500 T
• Effect of a magnetic field on Mott-Hubbard systems
• The nature of correlations in the insulating states of twisted bilayer graphene
• ``Linearized'' Dynamical Mean-Field Theory for the Mott-Hubbard transition
• Magnetic-Field-Induced Mott Transition in a Quasi-Two-Dimensional Organic Conductor
• Mott Transition and Magnetism in Rare Earth Nickelates and its Fingerprint on the X-ray Scattering
• Twisted bilayer graphene in a parallel magnetic field
• Field dependent quasiparticles in the infinite dimensional Hubbard model
• Fate of a topological invariant for correlated lattice electrons at finite temperature
• Field dependent quasiparticles in models of strongly correlated electrons
• Hofstadter states and reentrant charge order in a semiconductor moiré lattice
• Hofstadter butterfly for a finite correlated system
• Mott physics beyond Brinkman-Rice scenario
• Universal magnetic oscillations of DC conductivity in the incoherent regime of correlated systems
• Orbital Effect of the Magnetic Field in Dynamical Mean-Field Theory
• Thermodynamics of correlated electrons in a magnetic field
• Nevanlinna.jl: A Julia implementation of Nevanlinna analytic continuation