Abstract The λ-N2, a low-temperature, high-pressure (LTHP) molecular solid nitrogen, exhibits an exceptionally wide range of P-T stability. In this letter, six separate P-T paths are used to probe the formation condition and phase stability of the λ-N2, and the phase stability boundary has been reevaluated based on our Raman observations. The vibrational modes for λ-N2 have been studied by analyzing the local molecular properties, and a sudden broadening and turnover of vibron in Raman spectra at about 54 GPa has been observed.

中文翻译：

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λ-N2 的拉曼光谱和相位稳定性

摘要 λ-N2 是一种低温高压 (LTHP) 分子固体氮，表现出异常广泛的 PT 稳定性。在这封信中，六个独立的 PT 路径用于探测 λ-N2 的形成条件和相位稳定性，并根据我们的拉曼观测重新评估了相位稳定性边界。通过分析局部分子特性，研究了 λ-N2 的振动模式，并观察到拉曼光谱中振子在约 54 GPa 处的突然展宽和周转。