Phase with pressure-induced shuttlewise deformation in dense solid atomic hydrogen
Phase with pressure-induced shuttlewise deformation in dense solid atomic hydrogen
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DOI：
10.1103/physrevb.90.104102
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发表时间：
2014-09
影响因子：
3.7
通讯作者：
T. Ishikawa;H. Nagara;T. Oda;N. Suzuki;K. Shimizu
中科院分区：
文献类型：
--
作者：
T. Ishikawa;H. Nagara;T. Oda;N. Suzuki;K. Shimizu
用第一性原理计算，包括质子运动的调和零点能量贡献，预测了固体氢原子中一个表现出压力诱导的正交和四方结构之间的穿梭结构变形的相。结构是由结构的剪切变形形成的，指定变形的角度随压力在范围内变化，对应于。在穿梭变形阶段，由于声子软化，电子-声子相互作用增强，从而在高温下产生超导性。
A phase which shows pressure-induced shuttlewise structural deformation between orthorhombicand tetragonalstructures has been predicted in solid atomic hydrogen by means of the first-principles calculations, including harmonic zero-point energy contributions of proton motions. Thestructure is formed by shear distortion from thestructure, and the angle specifying the distortion changes with pressure in the rangearound, which corresponds to. In the shuttlewise deforming phase, the electron-phonon interaction is enhanced owing to phonon softenings, which brings about superconductivity at elevated temperatures.