Chijioke Akobuije, Silvera Isaac F
Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Phys Rev Lett. 2006 Dec 22;97(25):255701. doi: 10.1103/PhysRevLett.97.255701.
Solid hydrogen deuteride (HD) has been studied to a pressure of 159 GPa and to low temperatures using near infrared spectroscopy. Of the two high pressure phases observed in hydrogen and deuterium, known as the BSP (broken-symmetry phase) and the A phase, only the BSP had been observed in the lower pressure region of the phase line of HD and it was unusually different from the homonuclear diatomic species with a reentrant behavior. In this Letter the BSP phase line is identified to its maximum pressure of 159 GPa. Infrared absorption reveals a transition to the A phase, observed for the first time in HD with onset at 157+/-3 GPa. A new phase of electric dipolar order that should occur at low temperature is discussed.
利用近红外光谱，对固态氢化氘（HD）在159吉帕的压力和低温条件下进行了研究。在氢和氘中观察到的两个高压相，即所谓的BSP（破缺对称相）和A相，在HD相线的低压区域仅观察到了BSP相，它与同核双原子物种异常不同，具有折返行为。在本信函中，BSP相线被确定至其159吉帕的最大压力。红外吸收揭示了向A相的转变，这是首次在HD中观察到，起始压力为157±3吉帕。讨论了一种应在低温下出现的新的电偶极有序相。
