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Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
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Superconductivity of thulium substituted clathrate hexahydrides at moderate pressure
Hongyu Huang1, Chao Deng1, Hao Song1
1School of Physical Science and Technology, Institute of High Pressure Physics, Ningbo University, Ningbo, 315211, People's Republic of China.
Abstract:
Due to the BCS theory, hydrogen, the lightest element, would be the prospect of room-temperature superconductor after metallization, but because of the difficulty of the hydrogen metallization, the theory about hydrogen pre-compression was proposed that the hydrogen-rich compounds could be a great option for the high Tc superconductors. The superior properties of TmH6, YbH6 and LuH6 indicated the magnificent potential of heavy rare earth elements for low-pressure stability. Here, we designed XTmH12 (X = Y, Yb, Lu, and La) to obtain higher Tc while maintaining low pressure stability. Most prominently, YbTmH12 can stabilize at a pressure of 60 GPa. Compared with binary TmH6 hydride, its Tc was increased to 48 K. The results provide an effective method for the rational design of moderate pressure stabilized hydride superconductors.
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