Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2275
Title: Local theory for Mott-Anderson localization
Authors: Sen, Sudeshna
Terletska, Hanna
Moreno, Juana
Vidhyadhiraja, N. S.
Jarrell, Mark
Keywords: Physics
Metal-Insulator-Transition
2-Dimensional Electron-Systems
Single-Particle Dynamics
Mean-Field Theory
Moment Approach
Renormalization-Group
Random Lattices
Heavy Fermions
Model
Diffusion
Issue Date: 2016
Publisher: American Physical Society
Citation: Sen, S.; Terletska, H.; Moreno, J.; Vidhyadhiraja, N. S.; Jarrell, M., Local theory for Mott-Anderson localization. Physical Review B 2016, 94 (23), 12 http://dx.doi.org/10.1103/PhysRevB.94.235104
Physical Review B
94
23
Abstract: The paramagnetic metallic phase of the Anderson-Hubbard model (AHM) is investigated using a nonperturbative local moment approach within the framework of dynamical mean-field theory with a typical medium. Our focus is on the breakdown of the metallic phase near the metal-insulators transition as seen in the single-particle spectra, scattering rates, and the associated distribution of Kondo scales. We demonstrate the emergence of a universal, underlying low-energy scale, T-K(peak). This lies close to the peak of the distribution of Kondo scales obtained within the metallic phase of the paramagnetic AHM. Spectral dynamics for energies omega less than or similar to T-K(peak) display Fermi liquid universality crossing over to an incoherent universal dynamics for omega >> T-K(peak) in the scaling regime. Such universal dynamics indicate that within a local theory the low to moderately low-energy physics is governed by an effective, disorder renormalized Kondo screening.
Description: Restricted Access
URI: http://hdl.handle.net/10572/2275
ISSN: 2469-9950
Appears in Collections:Research Articles (Vidhyadhiraja N. S.)

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