Pincini, D;
Vale, JG;
Donnerer, C;
de la Torre, A;
Hunter, EC;
Perry, R;
Sala, MM;
... McMorrow, DF; + view all
(2017)
Anisotropic exchange and spin-wave damping in pure and electron-doped Sr2IrO4.
Physical Review B
, 96
(7)
, Article 075162. 10.1103/PhysRevB.96.075162.
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Abstract
The collective magnetic excitations in the spin-orbit Mott insulator (Sr1−xLax )2IrO4 (x = 0, 0.01, 0.04, 0.1) were investigated by means of resonant inelastic x-ray scattering. We report significant magnon energy gaps at both the crystallographic and antiferromagnetic zone centers at all doping levels, along with a remarkably pronounced momentum-dependent lifetime broadening. The spin-wave gap is accounted for by a significant anisotropy in the interactions between Jeff = 1/2 isospins, thus marking the departure of Sr2IrO4 from the essentially isotropic Heisenberg model appropriate for the superconducting cuprates.
| Type: | Article |
|---|---|
| Title: | Anisotropic exchange and spin-wave damping in pure and electron-doped Sr2IrO4 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.96.075162 |
| Publisher version: | http://doi.org/10.1103/PhysRevB.96.075162 |
| Language: | English |
| Additional information: | © 2017 American Physical Society. This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Condensed Matter, Physics, MOTT INSULATOR, LA2-XSRXCUO4 |
| 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 > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1550715 |
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