Abstract
Raman scattering is employed to explore the effects of hole doping in single crystals of Sr2Ir1-xRuxO4 (x=0, 0.01, 0.03, 0.05, 0.1, and 0.2). Introducing a few percentages of holes has a strong impact on magnetic excitations and lattice dynamics. With increasing x the well structured two-magnon continuum turns into diffusive magnetic scattering. Furthermore one- and two-phonon scatterings are rapidly suppressed. Remarkably, the two Ir(Ru)-O-Ir(Ru) bond angle modes with different Ir(Ru)O6 octahedral rotations coexist and compete upon hole doping. This is ascribed to the difference of electronic properties between Ir4+ and Ru4+ ions. The doping and temperature dependence of the bond angle modes suggests that an electronically phase separated state develops upon Ru doping.
| Original language | English |
|---|---|
| Article number | 104406 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 89 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2014 Mar 10 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
}
Effects of hole doping on magnetic and lattice excitations in Sr 2 Ir 1 - X Ru x O 4 (x = 0 - 0.2). / Glamazda, A.; Lee, W. J.; Choi, K. Y.; Lemmens, P.; Choi, H. Y.; Lee, N.; Choi, Y. J.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 89, No. 10, 104406, 10.03.2014.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effects of hole doping on magnetic and lattice excitations in Sr 2 Ir 1 - X Ru x O 4 (x = 0 - 0.2)
AU - Glamazda, A.
AU - Lee, W. J.
AU - Choi, K. Y.
AU - Lemmens, P.
AU - Choi, H. Y.
AU - Lee, N.
AU - Choi, Y. J.
PY - 2014/3/10
Y1 - 2014/3/10
N2 - Raman scattering is employed to explore the effects of hole doping in single crystals of Sr2Ir1-xRuxO4 (x=0, 0.01, 0.03, 0.05, 0.1, and 0.2). Introducing a few percentages of holes has a strong impact on magnetic excitations and lattice dynamics. With increasing x the well structured two-magnon continuum turns into diffusive magnetic scattering. Furthermore one- and two-phonon scatterings are rapidly suppressed. Remarkably, the two Ir(Ru)-O-Ir(Ru) bond angle modes with different Ir(Ru)O6 octahedral rotations coexist and compete upon hole doping. This is ascribed to the difference of electronic properties between Ir4+ and Ru4+ ions. The doping and temperature dependence of the bond angle modes suggests that an electronically phase separated state develops upon Ru doping.
AB - Raman scattering is employed to explore the effects of hole doping in single crystals of Sr2Ir1-xRuxO4 (x=0, 0.01, 0.03, 0.05, 0.1, and 0.2). Introducing a few percentages of holes has a strong impact on magnetic excitations and lattice dynamics. With increasing x the well structured two-magnon continuum turns into diffusive magnetic scattering. Furthermore one- and two-phonon scatterings are rapidly suppressed. Remarkably, the two Ir(Ru)-O-Ir(Ru) bond angle modes with different Ir(Ru)O6 octahedral rotations coexist and compete upon hole doping. This is ascribed to the difference of electronic properties between Ir4+ and Ru4+ ions. The doping and temperature dependence of the bond angle modes suggests that an electronically phase separated state develops upon Ru doping.
UR - http://www.scopus.com/inward/record.url?scp=84897883827&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84897883827&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.89.104406
DO - 10.1103/PhysRevB.89.104406
M3 - Article
AN - SCOPUS:84897883827
VL - 89
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 10
M1 - 104406
ER -