TY - JOUR
T1 - Raman scattering studies of spin, charge, and lattice dynamics in Ca2−xSrxRuO4 (0 < x < 0.2)
AU - Rho, H.
AU - Cooper, L.
AU - Nakatsuji, S.
AU - Fukazawa, H.
AU - Maeno, Y.
PY - 2003
Y1 - 2003
N2 - We use Raman scattering to study spin, charge, and lattice dynamics in various phases of Ca2−xSrxRuO4. 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 significantly below the metal-insulator transition (TMI), and hysteresis associated with the structural phase change, both of which are indicative of a first-order metal-insulator transition and a coexistence of metallic and insulating components for T < TMI.
AB - We use Raman scattering to study spin, charge, and lattice dynamics in various phases of Ca2−xSrxRuO4. 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 significantly below the metal-insulator transition (TMI), and hysteresis associated with the structural phase change, both of which are indicative of a first-order metal-insulator transition and a coexistence of metallic and insulating components for T < TMI.
UR - http://www.scopus.com/inward/record.url?scp=85038888679&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85038888679&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.68.100404
DO - 10.1103/PhysRevB.68.100404
M3 - Article
AN - SCOPUS:85038888679
SN - 1098-0121
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 10
ER -