Spin Qubit in a 2D Gd III Na I -Based Oxamato Supramolecular Coordination Framework.

Autor: Wang J; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, P. R. China., Jing Y; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, P. R. China., Cui MH; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, P. R. China., Lu YM; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, P. R. China., Ouyang Z; Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Gannan Normal University, 430074, Wuhan, P. R. China., Shao C; Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, P. R. China., Wang Z; Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Gannan Normal University, 430074, Wuhan, P. R. China., Song Y; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, P. R. China.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2023 Nov 24; Vol. 29 (66), pp. e202301771. Date of Electronic Publication: 2023 Oct 16.
DOI: 10.1002/chem.202301771
Abstrakt: Qubits are the basic unit of quantum information and computation. To realize quantum computing and information processing, the decoherence times of qubits must be long enough. Among the studies of molecule-based electron spin qubits, most of the work focused on the ions with the spin S=1/2, where only single-bit gates can be constructed. However, quantum operations require the qubits to interact with each other, so people gradually carry out relevant research in ions or systems with S>1/2 and multilevel states. In this work, a two-dimensional (2D) oxygen-coordinated Gd III Na I -based oxamato supramolecular coordination framework, Na[Gd(4-HOpa) 4 (H 2 O)] ⋅ 2H 2 O (1, 4-HOpa=N-4-hydroxyphenyloxamate), was selected as a possible carrier of qubit. The field-induced slow magnetic relaxation shows this system has phonon bottleneck (PB) effect at low temperatures with a very weak magnetic anisotropy. The pulse electron paramagnetic resonance studies show the spin-lattice and spin-spin relaxation times are T 1 =1.66 ms at 4 K and T m =4.25 μs at 8 K for its diamagnetically diluted sample (1Gd0.12 %). It suggested that the relatively long decoherence time is mainly ascribed to its near isotropic and the PB effect from resonance phonon trapped for pure sample, while the dilution further improves its qubit performance.
(© 2023 Wiley-VCH GmbH.)
Databáze: MEDLINE
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