Symmetry-mediated quantum coherence of W5+ spins in an oxygen-deficient double perovskite
Abstract Elucidating the factors limiting quantum coherence in real materials is essential to the development of quantum technologies. Here we report a strategic approach to determine the effect of lattice dynamics on spin coherence lifetimes using oxygen deficient double perovskites as host materia...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-06-01
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| Series: | npj Quantum Materials |
| Online Access: | https://doi.org/10.1038/s41535-025-00782-3 |
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| _version_ | 1849328974350516224 |
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| author | Shannon Bernier Mekhola Sinha Tyler J. Pearson Peter V. Sushko Paul H. Oyala Maxime A. Siegler W. Adam Phelan Abby N. Neill Danna E. Freedman Tyrel M. McQueen |
| author_facet | Shannon Bernier Mekhola Sinha Tyler J. Pearson Peter V. Sushko Paul H. Oyala Maxime A. Siegler W. Adam Phelan Abby N. Neill Danna E. Freedman Tyrel M. McQueen |
| author_sort | Shannon Bernier |
| collection | DOAJ |
| description | Abstract Elucidating the factors limiting quantum coherence in real materials is essential to the development of quantum technologies. Here we report a strategic approach to determine the effect of lattice dynamics on spin coherence lifetimes using oxygen deficient double perovskites as host materials. In addition to obtaining millisecond T 1 spin-lattice lifetimes at T ~ 10 K, measurable quantum superpositions were observed up to room temperature. We determine that T 2 enhancement in Sr2CaWO6-δ over previously studied Ba2CaWO6-δ is caused by a dynamically-driven increase in effective site symmetry around the dominant paramagnetic site, assigned as W5+ via electron paramagnetic resonance spectroscopy. Further, a combination of experimental and computational techniques enabled quantification of the relative strength of spin-phonon coupling of each phonon mode. This analysis demonstrates the effect of thermodynamics and site symmetry on the spin lifetimes of W5+ paramagnetic defects, an important step in the process of reducing decoherence to produce longer-lived qubits. |
| format | Article |
| id | doaj-art-e852486b14684841817e458384aa81a3 |
| institution | Kabale University |
| issn | 2397-4648 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Materials |
| spelling | doaj-art-e852486b14684841817e458384aa81a32025-08-20T03:47:24ZengNature Portfolionpj Quantum Materials2397-46482025-06-0110111110.1038/s41535-025-00782-3Symmetry-mediated quantum coherence of W5+ spins in an oxygen-deficient double perovskiteShannon Bernier0Mekhola Sinha1Tyler J. Pearson2Peter V. Sushko3Paul H. Oyala4Maxime A. Siegler5W. Adam Phelan6Abby N. Neill7Danna E. Freedman8Tyrel M. McQueen9Department of Chemistry, The Johns Hopkins UniversityDepartment of Chemistry, The Johns Hopkins UniversityDepartment of Chemistry, Northwestern UniversityPhysical and Computational Sciences Directorate, Pacific Northwest National LaboratoryDivision of Chemistry and Chemical Engineering, California Institute of TechnologyDepartment of Chemistry, The Johns Hopkins UniversityDepartment of Chemistry, The Johns Hopkins UniversityDepartment of Chemistry, The Johns Hopkins UniversityDepartment of Chemistry, Northwestern UniversityDepartment of Chemistry, The Johns Hopkins UniversityAbstract Elucidating the factors limiting quantum coherence in real materials is essential to the development of quantum technologies. Here we report a strategic approach to determine the effect of lattice dynamics on spin coherence lifetimes using oxygen deficient double perovskites as host materials. In addition to obtaining millisecond T 1 spin-lattice lifetimes at T ~ 10 K, measurable quantum superpositions were observed up to room temperature. We determine that T 2 enhancement in Sr2CaWO6-δ over previously studied Ba2CaWO6-δ is caused by a dynamically-driven increase in effective site symmetry around the dominant paramagnetic site, assigned as W5+ via electron paramagnetic resonance spectroscopy. Further, a combination of experimental and computational techniques enabled quantification of the relative strength of spin-phonon coupling of each phonon mode. This analysis demonstrates the effect of thermodynamics and site symmetry on the spin lifetimes of W5+ paramagnetic defects, an important step in the process of reducing decoherence to produce longer-lived qubits.https://doi.org/10.1038/s41535-025-00782-3 |
| spellingShingle | Shannon Bernier Mekhola Sinha Tyler J. Pearson Peter V. Sushko Paul H. Oyala Maxime A. Siegler W. Adam Phelan Abby N. Neill Danna E. Freedman Tyrel M. McQueen Symmetry-mediated quantum coherence of W5+ spins in an oxygen-deficient double perovskite npj Quantum Materials |
| title | Symmetry-mediated quantum coherence of W5+ spins in an oxygen-deficient double perovskite |
| title_full | Symmetry-mediated quantum coherence of W5+ spins in an oxygen-deficient double perovskite |
| title_fullStr | Symmetry-mediated quantum coherence of W5+ spins in an oxygen-deficient double perovskite |
| title_full_unstemmed | Symmetry-mediated quantum coherence of W5+ spins in an oxygen-deficient double perovskite |
| title_short | Symmetry-mediated quantum coherence of W5+ spins in an oxygen-deficient double perovskite |
| title_sort | symmetry mediated quantum coherence of w5 spins in an oxygen deficient double perovskite |
| url | https://doi.org/10.1038/s41535-025-00782-3 |
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