Raman scattering studies of spin, charge, and lattice dynamics in Ca_{2-x}Sr_{x}RuO_{4} (0 =< x < 0.2)

Abstract

We use Raman scattering to study spin, charge, and lattice dynamics in various phases of Ca_{2-x}Sr_{x}RuO_{4}. With increasing substitution of Ca by Sr in the range 0 =< x < 0.2, we observe (1) evidence for an increase of the electron-phonon interaction strength, (2) an increased temperature-dependence of the two-magnon energy and linewidth in the antiferromagnetic insulating phase, and (3) evidence for charge gap development, and hysteresis associated with the structural phase change, both of which are indicative of a first-order metal-insulator transition (T_{MI}) and a coexistence of metallic and insulating components for T < T_{MI}.

References in corpus (6)

• Structural and magnetic aspects of the metal insulator transition in Ca${}_{2-x}$Sr${}_x$RuO${}_4$
• Destruction of the Mott Insulating Ground State of Ca_2RuO_4 by a Structural Transition
• Prediction of Orbital Ordering in Single-Layered Ruthenates
• Electron and orbital correlations in Ca_{2-x}Sr_{x}RuO_{4} probed by optical spectroscopy
• Pressure-Tuned Collapse of the Mott-Like State in Ca_{n+1}Ru_nO_{3n+1} (n=1,2): Raman Spectroscopic Studies
• Nonresonant B1g Raman scattering in the Hubbard model

Cited by in corpus (9)

• Inelastic Light Scattering From Correlated Electrons
• Mechanism of hopping transport in disordered Mott insulators
• Raman scattering from Higgs mode oscillations in the two-dimensional antiferromagnet Ca${}_2$RuO${}_4$
• Comparative Raman Studies of Sr2RuO4, Sr3Ru2O7 and Sr4Ru3O10
• Electron-lattice coupling, orbital stability and the phase diagram of Ca${}_{2-x}$Sr${}_x$RuO${}_4$
• Raman scattering from current-stabilized nonequilibrium phases in Ca${}_2$RuO${}_4$
• Lattice dynamics and the electron-phonon interaction in Ca${}_2$RuO${}_4$
• Van Vleck excitons in Ca${}_2$RuO${}_4$
• Low temperature behavior of the heavy Fermion Ce3Co4Sn13