Probing the Dynamics of Pressure- and Magnetic Field -Tuned Transitions in Strongly-Correlated Electron Systems: Raman Scattering Studies
type: CreativeWork
description: Third, I present Raman scattering measurements of (Eu,Gd)O and (Eu,La)B 6 as functions of doping, B isotope, magnetic field, and temperature. Our results reveal a variety of distinct regimes as a function of decreasing T: (i) a paramagnetic semimetal regime, characterized by a collision-dominated electronic scattering response whose scattering rate Gamma decreases with decreasing temperature; (ii) a spin-disorder scattering regime, characterized by a collision-dominated electronic scattering response whose scattering rate Gamma scales with the magnetic susceptibility; (iii) a magnetic polaron (MP) regime, in which the development of an H = 0 spin-flip Raman response betrays the formation of magnetic polarons above the Curie temperature Tc; and (iv) a ferromagnetic metal regime, characterized by a flat electronic continuum response.
abstract: Third, I present Raman scattering measurements of (Eu,Gd)O and (Eu,La)B 6 as functions of doping, B isotope, magnetic field, and temperature. Our results reveal a variety of distinct regimes as a function of decreasing T: (i) a paramagnetic semimetal regime, characterized by a collision-dominated electronic scattering response whose scattering rate Gamma decreases with decreasing temperature; (ii) a spin-disorder scattering regime, characterized by a collision-dominated electronic scattering response whose scattering rate Gamma scales with the magnetic susceptibility; (iii) a magnetic polaron (MP) regime, in which the development of an H = 0 spin-flip Raman response betrays the formation of magnetic polarons above the Curie temperature Tc; and (iv) a ferromagnetic metal regime, characterized by a flat electronic continuum response.
author: Snow, Clark Sheldon
language: eng
keywords: Physics, Condensed Matter
date published: 2015-09-25T20:02:43Z
date modified: 2026-07-22T22:26:14Z
provider: University of Illinois - Urbana-Champaign
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Illinois at Urbana-Champaign

PropertyValue
property ID: Handle
value: http://hdl.handle.net/2142/80491