Broadband electron paramagnetic resonance spectroscopy of ${}^{167}$Er:${}^7$LiYF${}_4$ at mK temperatures

Abstract

Rare-earth spin ensembles are a promising platform for microwave quantum memory applications due to their hyperfine transitions, which can exhibit exceptionally long coherence times when using an operation point with zero first-order Zeeman (ZEFOZ) shift. In this work, we use broadband electron paramagnetic resonance (EPR) spectroscopy on ${}^{167}$Er:${}^7$LiYF${}_4$ single crystals at sub-Kelvin temperatures. By fitting the spin Hamiltonian to the zero-field spectrum, we obtain refined parameters of the magnetic field-independent interactions, such as the hyperfine and quadrupole interaction. We also study the influence of the quadrupole interaction on the hyperfine splitting in the zero and low magnetic field range by analyzing EPR-spectra between 0 mT and 50 mT. Our findings highlight the broadband EPR spectroscopy approach as a powerful tool for the precise determination of the spin Hamiltonian parameters and for the characterization of hyperfine transitions in terms of their selection rules and linewidth.

12 pages, 6 figures

References in corpus (26)

• A Quantum Engineer's Guide to Superconducting Qubits
• Quantum technologies with hybrid systems
• Hybrid quantum circuit with a superconducting qubit coupled to a spin ensemble
• Atomic clock transitions in silicon-based spin qubits
• Dynamic decoherence control of a solid-state nuclear quadrupole qubit
• Method of extending hyperfine coherence times in Pr^3+:Y_2SiO_5
• Simultaneous coherence enhancement of optical and microwave transitions in solid-state electronic spins
• Factoring 2048-bit RSA Integers in 177 Days with 13436 Qubits and a Multimode Memory
• Temperature dependent magnetic damping of yttrium iron garnet spheres
• Coherent storage of microwave excitations in rare-earth nuclear spins
• Microwave multimode memory with an Er${}^{3+}$:Y${}_2$SiO${}_5$ spin ensemble
• Gilbert damping of magnetostatic modes in a yttrium iron garnet sphere
• Reducing decoherence in optical and spin transitions in rare-earth-ion doped materials
• Proposal for a coherent quantum memory for propagating microwave photons
• Observing electron spin resonance between 0.1 and 67 GHz at temperatures between 50 mK and 300 K using broadband metallic coplanar waveguides
• Long spin coherence times in the ground state and an optically excited state of ${}^{167}$Er${}^{3+}$:Y${}_2$SiO${}_5$ at zero magnetic field
• Broadband electron spin resonance from 500 MHz to 40 GHz using superconducting coplanar waveguides
• High cooperativity coupling between a phosphorus donor spin ensemble and a superconducting microwave resonator
• Optical coherence of ${}^{166}$Er:${}^7$LiYF${}_4$ crystal below 1 Kelvin
• Dynamical decoupling of spin ensembles with strong anisotropic interactions
• General Magnetic Transition Dipole Moments for Electron Paramagnetic Resonance
• Echo trains in pulsed electron spin resonance of a strongly coupled spin ensemble
• Transmon Qubit in a Magnetic Field: Evolution of Coherence and Transition Frequency
• Spin resonance linewidths of bismuth donors in silicon coupled to planar microresonators
• Electromagnetically Induced Transparency in a mono-isotopic ${}^{167}$Er:${}^7$LiYF${}_4$ crystal below 1 Kelvin
• Cryogenic frequency-domain electron spin resonance spectrometer based on coplanar waveguides and field modulation

Cited by in corpus (2)

• Experimental setup for the combined study of spin ensembles and superconducting quantum circuits
• Step-by-step design guide of a cryogenic three-axis vector magnet