Mott transition

About: Mott transition is a research topic. Over the lifetime, 2444 publications have been published within this topic receiving 78401 citations.

Lessons from Nanoelectronics: A New Perspective on Transport

Abstract: The Bottom-Up Approach Introductory Concepts: Why Electrons Flow The Elastic Resistor The New Ohm's Law Where is the Resistance? Transverse Modes Drude Formula Kubo Formula How Realistic is an Elastic Resistor? Semiclassical & Quantum Transport: The Nanotransistor Semiclassical Transport and the SCF Method Resistance and Uncertainty Quantum Transport: Schrodinger to NEGF Resonant Tunneling and Anderson Localization Coulomb Blockade and Mott Transition Spin Blockade Hall Effect / QHE Beyond Voltages and Currents: Thermoelectricity Heat Flow Spin Flow Spin Transistor Entropy Flow And Maxwell's Demon Epilogue: Physics in a Grain of Sand Solutions to Exercises Additional Problems.

Creation of a molecular condensate by dynamically melting a Mott insulator

Abstract: We propose the creation of a molecular Bose-Einstein condensate by loading an atomic condensate into an optical lattice and driving it into a Mott insulator with exactly two atoms per site Molecules in a Mott insulator state are then created under well defined conditions by photoassociation with essentially unit efficiency Finally, the Mott insulator is melted and a superfluid state of the molecules is created We study the dynamics of this process and photoassociation of tightly trapped atoms

High-spin to low-spin and orbital polarization transitions in multiorbital Mott systems.

Abstract: We study the interplay of crystal field splitting and Hund coupling in a two-orbital model which captures the essential physics of systems with two electrons or holes in the e(g) shell. We use single site dynamical mean field theory with a recently developed impurity solver, which is able to access strong couplings and low temperatures. The fillings of the orbitals and the location of phase boundaries are computed as a function of Coulomb repulsion, exchange coupling, and crystal field splitting. We find that the Hund coupling can drive the system into a novel Mott insulating phase with vanishing orbital susceptibility. Away from half-filling, the crystal field splitting can induce an orbital selective Mott state.

Collapse of magnetic moment drives the Mott transition in MnO

Abstract: The precise mechanism of the insulator-to-metal transition in MnO has been unravelled by a computational approach that shows that the transition is a result of the simultaneous collapse of the magnetic moment.

Theory of a continuous Mott transition in two dimensions

Abstract: We study theoretically the zero-temperature phase transition in two dimensions from a Fermi liquid to a paramagnetic Mott insulator with a spinon Fermi surface. We show that the approach to the bandwidth-controlled Mott transition from the metallic side is accompanied by a vanishing quasiparticle residue and a diverging effective mass. The Landau parameters ${F}_{s}^{0},{F}_{a}^{0}$ also diverge. Right at the quantum critical point there is a sharply defined ``critical Fermi surface'' but no Landau quasiparticle. The critical point has a $T\text{ }\text{ln}\text{ }1/T$ specific heat and a nonzero $T=0$ resistivity. We predict an interesting universal resistivity jump in the residual resistivity at the critical point as the transition is approached from the metallic side. The crossovers out of the critical region are also studied. Remarkably the initial crossover out of criticality on the metallic side is to a marginal Fermi liquid metal. At much lower temperatures there is a further crossover into the Landau Fermi liquid. The ratio of the two crossover scales vanishes when approaching the critical point. Similar phenomena are found in the insulating side. The filling-controlled Mott transition is also studied. Implications for experiments on the layered triangular lattice organic material $\ensuremath{\kappa}\ensuremath{-}{(\text{ET})}_{2}{\text{Cu}}_{2}{(\text{CN})}_{3}$ are discussed.