Loubeyre Paul, Occelli Florent, Dumas Paul
CEA, DAM, DIF, F-91297 Arpajon, France.
Université Paris Saclay, Laboratoire Matiere Condit Extremes, CEA, F-91680 Bruyeres Le Chatel, France.
Phys Rev Lett. 2022 Jul 15;129(3):035501. doi: 10.1103/PhysRevLett.129.035501.
How are nuclear quantum fluctuations affecting the properties of dense hydrogen approaching metallization? We report here Raman spectroscopy and synchrotron infrared absorption measurements on deuterium up to 460 GPa at 80 K. By comparing to a previous similar study on hydrogen, isotopic effects on the electronic and vibrational properties in phase III are disclosed. Also, evidence of a probable transition to metal deuterium is observed, shifted by about 35 GPa compared to that in hydrogen. Advanced calculations, quantifying a reduction of the band gap caused by nuclear quantum fluctuations, are compared to the present data.
核量子涨落如何影响接近金属化的高密度氢的性质？我们在此报告了在80K温度下对高达460GPa的氘进行的拉曼光谱和同步辐射红外吸收测量。通过与先前对氢的类似研究进行比较，揭示了同位素对III相电子和振动性质的影响。此外，还观察到了可能向金属氘转变的证据，与氢相比，转变压力偏移了约35GPa。将量化核量子涨落导致的带隙减小的先进计算结果与当前数据进行了比较。
