1. Optical study of the anisotropic erbium spin flip-flop dynamics
- Author
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Thierry Chanelière, J.-L. Le Gouët, Anne Louchet-Chauvet, Lucile Veissier, B. Car, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Nanophysique et Semiconducteurs (NPSC), Institut Néel (NEEL), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
- Subjects
FOS: Physical sciences ,chemistry.chemical_element ,02 engineering and technology ,01 natural sciences ,Erbium ,[PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] ,Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ,0103 physical sciences ,010306 general physics ,Anisotropy ,ComputingMilieux_MISCELLANEOUS ,Physics ,Quantum Physics ,Condensed Matter - Mesoscale and Nanoscale Physics ,Condensed matter physics ,Spins ,021001 nanoscience & nanotechnology ,3. Good health ,Orientation (vector space) ,Dipole ,chemistry ,Spin-flip ,Quantum Physics (quant-ph) ,0210 nano-technology ,Order of magnitude ,Magnetic dipole–dipole interaction - Abstract
We investigate the erbium flip-flop dynamics as a limiting factor of the electron spin lifetime and more generally as an indirect source of decoherence in rare-earth doped insulators. Despite the random isotropic arrangement of dopants in the host crystal, the dipolar interaction strongly depends on the magnetic field orientation following the strong anisotropy of the $g$-factor. In Er$^{3+}$:Y$_2$SiO$_5$, we observe by transient optical spectroscopy a three orders of magnitude variation of the erbium flip-flop rate (10ppm dopant concentration). The measurements in two different samples, with 10ppm and 50ppm concentrations, are well-supported by our analytic modeling of the dipolar coupling between identical spins with an anisotropic $g$-tensor. The model can be applied to other rare-earth doped materials. We extrapolate the calculation to Er$^{3+}$:CaWO$_4$, Er$^{3+}$:LiNbO$_3$ and Nd$^{3+}$:Y$_2$SiO$_5$ at different concentrations.
- Published
- 2019