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B Keimer - One of the best experts on this subject based on the ideXlab platform.
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spin wave gap collapse in rh doped sr2iro4
Physical Review B, 2020Co-Authors: J Bertinshaw, Jungho Kim, Jinkwang Kim, J Porras, K Ueda, Nahye Sung, A Efimenko, A Bombardi, B KeimerAbstract:We use resonant inelastic x-ray scattering (RIXS) at the Ir ${L}_{3}$ edge to study the effect of hole doping upon the ${J}_{\text{eff}}=\frac{1}{2}$ Mott-insulating state in ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$, via Rh replacement of the Ir site. The spin-wave gap, associated with XY-type spin-exchange anisotropy, collapses with increasing Rh content, prior to the suppression of the Mott-insulating state and in contrast to electron doping via La substitution of the Sr site. At the same time, despite Heavy Damping, the $d\ensuremath{-}d$ excitation spectra retain their overall amplitude and dispersion character. A careful study of the spin-wave spectrum reveals that deviations from the ${J}_{1}\ensuremath{-}{J}_{2}\ensuremath{-}{J}_{3}$ Heisenberg used to model the pristine system disappear at intermediate doping levels. These findings are interpreted in terms of a modulation of Ir-Ir correlations due to the influence of Rh impurities upon nearby Ir wave functions, even as the single-band ${J}_{\text{eff}}=\frac{1}{2}$ model remains valid up to full carrier delocalization. They underline the importance of the transition metal site symmetry when doping pseudospin systems such as ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$.
Jinkwang Kim - One of the best experts on this subject based on the ideXlab platform.
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spin wave gap collapse in rh doped sr2iro4
Physical Review B, 2020Co-Authors: J Bertinshaw, Jungho Kim, Jinkwang Kim, J Porras, K Ueda, Nahye Sung, A Efimenko, A Bombardi, B KeimerAbstract:We use resonant inelastic x-ray scattering (RIXS) at the Ir ${L}_{3}$ edge to study the effect of hole doping upon the ${J}_{\text{eff}}=\frac{1}{2}$ Mott-insulating state in ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$, via Rh replacement of the Ir site. The spin-wave gap, associated with XY-type spin-exchange anisotropy, collapses with increasing Rh content, prior to the suppression of the Mott-insulating state and in contrast to electron doping via La substitution of the Sr site. At the same time, despite Heavy Damping, the $d\ensuremath{-}d$ excitation spectra retain their overall amplitude and dispersion character. A careful study of the spin-wave spectrum reveals that deviations from the ${J}_{1}\ensuremath{-}{J}_{2}\ensuremath{-}{J}_{3}$ Heisenberg used to model the pristine system disappear at intermediate doping levels. These findings are interpreted in terms of a modulation of Ir-Ir correlations due to the influence of Rh impurities upon nearby Ir wave functions, even as the single-band ${J}_{\text{eff}}=\frac{1}{2}$ model remains valid up to full carrier delocalization. They underline the importance of the transition metal site symmetry when doping pseudospin systems such as ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$.
J Bertinshaw - One of the best experts on this subject based on the ideXlab platform.
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spin wave gap collapse in rh doped sr2iro4
Physical Review B, 2020Co-Authors: J Bertinshaw, Jungho Kim, Jinkwang Kim, J Porras, K Ueda, Nahye Sung, A Efimenko, A Bombardi, B KeimerAbstract:We use resonant inelastic x-ray scattering (RIXS) at the Ir ${L}_{3}$ edge to study the effect of hole doping upon the ${J}_{\text{eff}}=\frac{1}{2}$ Mott-insulating state in ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$, via Rh replacement of the Ir site. The spin-wave gap, associated with XY-type spin-exchange anisotropy, collapses with increasing Rh content, prior to the suppression of the Mott-insulating state and in contrast to electron doping via La substitution of the Sr site. At the same time, despite Heavy Damping, the $d\ensuremath{-}d$ excitation spectra retain their overall amplitude and dispersion character. A careful study of the spin-wave spectrum reveals that deviations from the ${J}_{1}\ensuremath{-}{J}_{2}\ensuremath{-}{J}_{3}$ Heisenberg used to model the pristine system disappear at intermediate doping levels. These findings are interpreted in terms of a modulation of Ir-Ir correlations due to the influence of Rh impurities upon nearby Ir wave functions, even as the single-band ${J}_{\text{eff}}=\frac{1}{2}$ model remains valid up to full carrier delocalization. They underline the importance of the transition metal site symmetry when doping pseudospin systems such as ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$.
K Ueda - One of the best experts on this subject based on the ideXlab platform.
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spin wave gap collapse in rh doped sr2iro4
Physical Review B, 2020Co-Authors: J Bertinshaw, Jungho Kim, Jinkwang Kim, J Porras, K Ueda, Nahye Sung, A Efimenko, A Bombardi, B KeimerAbstract:We use resonant inelastic x-ray scattering (RIXS) at the Ir ${L}_{3}$ edge to study the effect of hole doping upon the ${J}_{\text{eff}}=\frac{1}{2}$ Mott-insulating state in ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$, via Rh replacement of the Ir site. The spin-wave gap, associated with XY-type spin-exchange anisotropy, collapses with increasing Rh content, prior to the suppression of the Mott-insulating state and in contrast to electron doping via La substitution of the Sr site. At the same time, despite Heavy Damping, the $d\ensuremath{-}d$ excitation spectra retain their overall amplitude and dispersion character. A careful study of the spin-wave spectrum reveals that deviations from the ${J}_{1}\ensuremath{-}{J}_{2}\ensuremath{-}{J}_{3}$ Heisenberg used to model the pristine system disappear at intermediate doping levels. These findings are interpreted in terms of a modulation of Ir-Ir correlations due to the influence of Rh impurities upon nearby Ir wave functions, even as the single-band ${J}_{\text{eff}}=\frac{1}{2}$ model remains valid up to full carrier delocalization. They underline the importance of the transition metal site symmetry when doping pseudospin systems such as ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$.
Nahye Sung - One of the best experts on this subject based on the ideXlab platform.
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spin wave gap collapse in rh doped sr2iro4
Physical Review B, 2020Co-Authors: J Bertinshaw, Jungho Kim, Jinkwang Kim, J Porras, K Ueda, Nahye Sung, A Efimenko, A Bombardi, B KeimerAbstract:We use resonant inelastic x-ray scattering (RIXS) at the Ir ${L}_{3}$ edge to study the effect of hole doping upon the ${J}_{\text{eff}}=\frac{1}{2}$ Mott-insulating state in ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$, via Rh replacement of the Ir site. The spin-wave gap, associated with XY-type spin-exchange anisotropy, collapses with increasing Rh content, prior to the suppression of the Mott-insulating state and in contrast to electron doping via La substitution of the Sr site. At the same time, despite Heavy Damping, the $d\ensuremath{-}d$ excitation spectra retain their overall amplitude and dispersion character. A careful study of the spin-wave spectrum reveals that deviations from the ${J}_{1}\ensuremath{-}{J}_{2}\ensuremath{-}{J}_{3}$ Heisenberg used to model the pristine system disappear at intermediate doping levels. These findings are interpreted in terms of a modulation of Ir-Ir correlations due to the influence of Rh impurities upon nearby Ir wave functions, even as the single-band ${J}_{\text{eff}}=\frac{1}{2}$ model remains valid up to full carrier delocalization. They underline the importance of the transition metal site symmetry when doping pseudospin systems such as ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$.