论文标题

电子在有机自旋链(O -DMTTF)的自旋 - 旋转相中的旋转相互作用2 x(x = cl,br,i)

Electron spins interaction in the spin-Peierls phase of the organic spin chain (o -DMTTF) 2 X (X = Cl, Br, I)

论文作者

Soriano, Loic, Pilone, Olivier, Kuz'Min, Michael D., Vezin, Herve, Jeannin, Olivier, Fourmigué, Marc, Orio, Maylis, Bertaina, Sylvain

论文摘要

我们使用X = Cl,Br和I的有机自旋 - 旋转链(O-DMTTF)的电子自旋共振(O-DMTTF)的电子共振。我们描述了相变过程中自旋间隙的温度依赖性,并量化了二聚参数$Δ$。在最低温度下,易感性受自旋二聚体链中的缺陷控制。这种密切相关的缺陷是链翻译对称性中断裂的结果。在缺陷的附近,旋转是偏振抗磁性的,形成了磁性孤子:自旋1 2的尺寸尺寸的准颗粒,由$δ$固定在缺陷上的$δ$。对于(O-DMTTF)2BR和(O-DMTTF)2Cl,我们表明,孤子总数中的一半是孤立的(如单打),而另一半对(孤子二聚体)具有强磁耦合。观察到单溶剂和孤子 - 二聚体的Rabi振荡,这在量子信息的背景下是先决条件。

We investigate the electron spin resonance of the organic spin-Peierls chain (o-DMTTF)2X with X = Cl, Br and I. We describe the temperature dependence of the spin gap during the phase transition and quantify the dimerization parameter $δ$. At the lowest temperatures, the susceptibility is governed by defects in the spin dimerized chain. Such strongly correlated defects are the consequence of breaks in the translational symmetry of the chain. In the vicinity of the defects the spins are polarized antiferomagnetically forming a magnetic soliton: a spin 1 2 quasi-particle of size ruled by $δ$ pinned to the defects. For (o-DMTTF)2Br and (o-DMTTF)2Cl, we show that the one-half of the total number of solitons are in isolation (as singles) whereas the other half form pairs (soliton dimers)with a strong magnetic coupling. The Rabi oscillations of both the single-soliton and the soliton-dimer are observed, which is a prerequisite in the context of quantum information.

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