Effects of hole doping on magnetic and lattice excitations in Sr 2 Ir 1 - X Ru x O 4 (x = 0 - 0.2)

A. Glamazda, W. J. Lee, K. Y. Choi, P. Lemmens, H. Y. Choi, N. Lee, Young Jai Choi

Research output: Contribution to journalArticle

15 Citations (Scopus)

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 languageEnglish
Article number104406
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number10
DOIs
Publication statusPublished - 2014 Mar 10

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Doping (additives)
excitation
Phonon scattering
Lattice vibrations
scattering
Electronic properties
Raman scattering
Single crystals
Scattering
Ions
Raman spectra
continuums
temperature dependence
single crystals
electronics
ions
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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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.",
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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, Young Jai.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 89, No. 10, 104406, 10.03.2014.

Research output: Contribution to journalArticle

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, Young Jai

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.

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