期刊
INORGANIC CHEMISTRY
卷 57, 期 2, 页码 731-740出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.7b02616
关键词
-
资金
- Italian MIUR [PRIN 2015-HYFSRT]
- Fondazione Ente Cassa di Risparmio di Firenze
- European COST Action [CA15128 MOLSPIN]
Control of spin lattice magnetic relaxation is crucial to observe long quantum coherence in spin systems at reasonable temperatures. Such a control is most often extremely difficult to achieve, because of the coexistence of several relaxation mechanisms, that is direct, Raman, and Orbach. These are not always easy to relate to the energy states of the investigated system, because of the contribution to the relaxation of additional spin phonon coupling phenomena mediated by intramolecular vibrations. In this work, we have investigated the effect of slight changes on the molecular structure of four vanadium(IV)based potential spin qubits on their spin dynamics, studied by alternate current (AC) susceptometry. The analysis of the magnetic field dependence of the relaxation time correlates well with the low-energy vibrational modes experimentally detected by time domain THz spectroscopy. This confirms and extends our preliminary observations on the role played by spin-vibration coupling in determining the fine structure of the spin lattice relaxation time as a function of the magnetic field, for S = 1/2, potential spin qubits. This study represents a step forward in the use of low-energy vibrational spectroscopy as a prediction tool for the design of molecular spin qubits with long-lived quantum coherence. Indeed, quantum coherence times of ca. 4.0-6.0 mu s in the 4-100 K range are observed for the best performing vanadyl derivatives identified through this multitechnique approach.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据