The effect of local magnetic moments on spectral properties and resistivity near the interaction- and doping induced Mott transitions

Abstract

We study the effect of the formation and screening of local magnetic moments on the temperature- and interaction dependencies of spectral functions and resistivity in the vicinity of the metal-insulator transition. We use the dynamical mean-field theory for the strongly correlated Hubbard model and associate the peculiarities of the above mentioned properties with those found for the local charge ${\chi }_c$ and spin ${\chi }_s$ susceptibilities. We show that at half filling the maximum of resistivity at a certain temperature $T^{\ast }$ corresponds to the appearance of central quasiparticle peak of the spectral function and entering the metallic regime with well defined fermionic quasiparticles. At the same time, the temperature of the crossover to the regime with screening of local magnetic moments, determined by the minimum of double occupation, is smaller than the temperature scale $T^{\ast }$ and coincides at half filling with the boundary $T_{\beta =1}(U)$ corresponding to the exponent of resistivity $\beta \equiv d\ln \rho /d\ln T=1$. Away from half filling we find weak increase of the temperature of the beginning and completion of the screening (i.e. Kondo temperature) of local magnetic moments, while the unscreened local magnetic moments exist only up to few percents of doping. In the low temperature regime $T<T_{\beta =1}$ simultaneous presence of itinerant and localized degrees of freedom yields almost linear temperature dependence of scattering rate and resistivity.

arXiv comment10 pages, 12 figures

References in corpus (34)

• TRIQS: A Toolbox for Research on Interacting Quantum Systems
• Diagrammatic routes to nonlocal correlations beyond dynamical mean field theory
• Anomalous Normal-State Properties of High-T${}_c$ Superconductors -- Intrinsic Properties of Strongly Correlated Electron Systems?
• Mott Transition from a Spin Liquid to a Fermi Liquid in the Spin-Frustrated Organic Conductor kappa-(ET)2Cu2(CN)3
• Full orbital calculation scheme for materials with strongly correlated electrons
• The Hubbard Model at Infinite Dimensions: Thermodynamic and Transport Properties
• Energy resolution and discretization artefacts in the numerical renormalization group
• Mott-Hubbard Metal-Insulator Transition in Paramagnetic V_2O_3: a LDA+DMFT(QMC) Study
• Transport properties of strongly correlated metals:a dynamical mean-field approach
• Enhanced Crystal Field Splitting and Orbital Selective Coherence by Strong Correlations in V_2O_3
• Quantum Critical Transport Near the Mott Transition
• Electronic Structure of Paramagnetic V_2O_3: Strongly Correlated Metallic and Mott Insulating Phase
• Magnetic and Dynamic Properties of the Hubbard Model in Infinite Dimensions
• Finite temperature crossovers and the quantum Widom line near the Mott transition
• Bad-metal behavior reveals Mott quantum criticality in doped Hubbard models
• Orbital selective local moment formation in iron: first principle route to an effective model
• Quantum Spin Liquids Unveil the Genuine Mott State
• Mott-Hubbard transition in V2O3 revisited
• Fingerprints of the local moment formation and its Kondo screening in the generalized susceptibilities of many-electron problems
• $i$QIST: An open source continuous-time quantum Monte Carlo impurity solver toolkit
• Rise and Fall of Landau's Quasiparticles While Approaching the Mott Transition
• Magnetic fluctuations and effective magnetic moments in γ-iron due to electronic structure peculiarities
• Charge transport in the Hubbard model at high temperatures: triangular versus square lattice
• The Bethe-Salpeter equation at the critical end-point of the Mott transition
• Wigner-Mott scaling of transport near the two-dimensional metal-insulator transition
• Spin dynamics of itinerant electrons: local magnetic moment formation and Berry phase
• $i$QIST v0.7: An open source continuous-time quantum Monte Carlo impurity solver toolkit
• Low-Temperature Dielectric Anomalies at the Mott Insulator-Metal Transition
• Mott quantum criticality in the one-band Hubbard model: Dynamical mean-field theory, power-law spectra, and scaling
• Local magnetic moment formation and Kondo screening in the half filled two dimensional single band Hubbard model
• Dynamical Mean-Field Theory and Its Applications to Real Materials
• Spin susceptibility of Anderson impurities in arbitrary conduction bands
• Transition of a prestine Mott insulator to a correlated Fermi liquid: Pressure-dependent optical investigations of a quantum spin liquid
• Dynamic charge Kondo effect and a slave fermion approach to the Mott transition

Cited by in corpus (10)

• Highly nonperturbative nature of the Mott metal-insulator transition: Two-particle vertex divergences in the coexistence region
• Transition from Pauli paramagnetism to Curie-Weiss behaviour in vanadium
• Protection of Correlation-Induced Phase Instabilities by Exceptional Susceptibilities
• Effective enhancement of the electron-phonon coupling driven by nonperturbative electronic density fluctuations
• Slave fermion interpretation of the pseudogap in doped Mott insulators
• Non-Perturbative Feats in the Physics of Correlated Antiferromagnets
• Single-boson exchange formulation of the Schwinger-Dyson equation and its application to the functional renormalization group
• Origin of misleading convergence in self-consistent many-electron theories: Fundamental aspects and practical implications
• Local magnetic moment formation and Kondo screening in the presence of Hund exchange: the two-band Hubbard model analysis
• Non-perturbative effects of short-range spatial correlations at the two-particle level