Will spin-relaxation times in molecular magnets permit quantum information processing?
Will spin-relaxation times in molecular magnets permit quantum information processing?
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DOI：
10.1103/physrevlett.98.057201
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发表时间：
2007-02-02
影响因子：
8.6
通讯作者：
Winpenny, Richard E. P.
中科院分区：
文献类型：
--
作者：
Ardavan, Arzhang;Rival, Olivier;Winpenny, Richard E. P.
利用X波段脉冲电子自旋共振技术，首次报道了分子纳米磁体的本征自旋晶格弛豫时间（T-1）和相位相干弛豫时间（T-2）。在Cr 7 M异金属轮中，M = Ni和Mn，相位相干弛豫由分子内电子自旋与质子的耦合主导。在氘代样品中，T-2在低温下达到3 μ s，这比自旋操纵的持续时间长几个数量级，满足了在量子信息应用中部署分子纳米磁体的先决条件。
Using X-band pulsed electron-spin resonance, we report the intrinsic spin-lattice (T-1) and phasecoherence (T-2) relaxation times in molecular nanomagnets for the first time. In Cr7M heterometallic wheels, with M = Ni and Mn, phase-coherence relaxation is dominated by the coupling of the electron spin to protons within the molecule. In deuterated samples T-2 reaches 3 mu s at low temperatures, which is several orders of magnitude longer than the duration of spin manipulations, satisfying a prerequisite for the deployment of molecular nanomagnets in quantum information applications.