Hyperfine interactions and coherent spin dynamics of isotopically purified 167Er3+ in polycrystalline Y2O3. (1st December 2022)

• Record Type: Journal Article
• Authors: Rajh, Tijana; Sun, Lei; Gupta, Shobhit; Yang, Jun; Zhang, Haitao; Zhong, Tian
• Is Part Of: Materials for quantum technology. Volume 2:Number 4(2022)
• Publication Date: 2022-12-01
• Subjects: rare-earth ion -- electron spin resonance -- hyperfine interactions; Materials science -- Periodicals; Quantum theory -- Periodicals; 530.12
• DOI: 10.1088/2633-4356/ac9e86
• Languages: English
• ISSNs: 2633-4356

Abstract

Abstract: 167 Er 3+ doped solids are a promising platform for quantum technology due to erbium's telecom C-band optical transition and its long hyperfine coherence times. We experimentally study the spin Hamiltonian and dynamics of 167 Er 3+ spins in Y2 O3 using electron paramagnetic resonance (EPR) spectroscopy. The anisotropic electron Zeeman, hyperfine and nuclear quadrupole matrices are fitted using data obtained by X-band (9.5 GHz) EPR spectroscopy. We perform pulsed EPR spectroscopy to measure spin relaxation time T 1 and coherence time T 2 for the 3 principal axes of an anisotropic g tensor. Long electronic spin coherence time up to 24.4 μ s is measured for lowest g transition at 4 K, exceeding previously reported values at much lower temperatures. Measurements of decoherence mechanism indicates T 2 limited by spectral diffusion and instantaneous diffusion. Long spin coherence times, along with a strong anisotropic hyperfine interaction makes 167 Er 3+ :Y2 O3 a rich system and an excellent candidate for spin-based quantum technologies.