摘要
The elastic anisotropy and superconductivity upon hydrostatic compression ofα,ω,and β Hf are investigated using first-principle methods.The results of elastic anisotropies show that they increase with increasing pressure for α and ω phases,while decrease upon compression forβphase.The calculated superconducting transition temperatures are in excellent agreement with experiments.Electron-phonon coupling constants(λ)are increasing with pressure for α and ω phases,while decreasing for β phase.For β phase,the large values ofλare mainly due to the obvious TA1 soft mode.Under further compression,the TA1 soft vibrational mode will disappear gradually.
作者
Cheng-Bin Zhang
Wei-Dong Li
Ping Zhang
Bao-Tian Wang
张成斌;李卫东;张平;王保田(Institute of Theoretical Physics and Department of Physics,and Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Center,Dongguan 523803,China;LCP,Institute of Applied Physics and Computational Mathematics,Beijing 100088,China)
基金
the National Natural Science Foundation of China(Grant Nos.11874247 and U1530258)
the National Key R&D Program of China(Grant No.2017YFA0304500)
the 111 Plan of China(Grant No.D18001)
the Hundred Talent Program of the Shanxi Province(2018)
the Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices of China(Grant Nos.KF201703 and KF201904).
