Vale, J;
Dashwood, C;
Paris, E;
Ishibe Veiga, L;
Garcia-Fernandez, M;
Nag, A;
Walters, A;
... McMorrow, D; + view all
(2019)
High-resolution resonant inelastic x-ray scattering study of the electron-phonon coupling in honeycomb α-Li₂IrO₃.
Physical Review B: Condensed Matter and Materials Physics
, 100
(22)
, Article 224303. 10.1103/PhysRevB.100.224303.
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Abstract
The excitations in honeycomb α − Li 2 IrO 3 have been investigated with high-resolution resonant inelastic x-ray scattering (RIXS) at the O K edge. The low-energy response is dominated by a fully resolved ladder of excitations, which we interpret as being due to multiphonon processes in the presence of strong electron-phonon coupling (EPC). At higher energies, the orbital excitations are shown to be dressed by phonons. The high quality of the data permits a quantitative test of the analytical model for the RIXS cross section, which has been proposed to describe EPC in transition-metal oxides (TMOs). We find that the magnitude of the EPC is comparable to that found for a range of 3 d TMOs. This indicates that EPC may be of equal importance in determining the phenomenology displayed by corresponding 5 d -based systems.
| Type: | Article |
|---|---|
| Title: | High-resolution resonant inelastic x-ray scattering study of the electron-phonon coupling in honeycomb α-Li₂IrO₃ |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.100.224303 |
| Publisher version: | https://doi.org/10.1103/PhysRevB.100.224303 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10086191 |
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