超高磁场下的固态和液态氧

T. Nomura, Y. Matsuda, Tatsuo C. Kobayashi
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引用次数: 0

摘要

氧是一种独特的分子,其自旋量子数S=1。在氧的凝聚相中,反铁磁相互作用和范德华力之间的微妙平衡导致了具有不同晶体结构的各种相。通过施加超高磁场,O2分子之间的反铁磁耦合断裂,可以出现新的高场相。我们研究了凝聚态氧在超高磁场下的物理性质,发现固态氧的稳定晶体结构在100T左右发生变化。即使在液态氧中,我们也观察到强烈的声衰减,这表明局部分子排列的波动。这些结果表明,磁场可以通过自旋-晶格耦合调节氧的堆积结构。我们的研究暗示了通过使用外部磁场来控制与氧相关的(生物)化学过程的可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Solid and Liquid Oxygen under Ultrahigh Magnetic Fields
Oxygen is a unique molecule that possesses a spin quantum number S=1. In the condensed phases of oxygen, the delicate balance between the antiferromagnetic interaction and van der Waals force results in the various phases with different crystal structures. By applying ultrahigh magnetic fields, the antiferromagnetic coupling between O2 molecules breaks, and novel high-field phases can appear. We have investigated the physical properties of condensed oxygen under ultrahigh magnetic fields and have found that the stable crystal structure of solid oxygen changes around 100 T. Even in liquid oxygen, we observed a strong acoustic attenuation, which indicates the fluctuation of local molecular arrangements. These results demonstrate that magnetic fields can modulate the packing structure of oxygen through spin-lattice coupling. Our study implies the possibility of controlling oxygen-related (bio-)chemical processes by using an external magnetic field.
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