Synthesis of superconducting phase of La 0.5 Ce 0.5 H 10 at high pressures.
- Resource Type
- Academic Journal
- Authors
- Huang G; Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China.; Peng D; Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.; University of Science and Technology of China, Hefei 230026, People's Republic of China.; Luo T; School of Science, Harbin Institute of Technology, Shenzhen 518055, People's Republic of China.; Chen LC; Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China.; School of Science, Harbin Institute of Technology, Shenzhen 518055, People's Republic of China.; Dalladay-Simpson P; Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China.; Cao ZY; Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China.; Center for Quantum Materials and Superconductivity (CQMS) and Department of Physics, Sungkyunkwan University, Suwon 16419, Republic of Korea.; Gorelli FA; Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China.; National Institute of Optics (INO-CNR) and European Laboratory for Non-Linear Spectroscopy (LENS), Via N. Carrara 1, 50019 Sesto Fiorentino (Florence), Italy.; Zhong GH; Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Shenzhen, People's Republic of China.; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.; Lin HQ; School of Physics, Zhejiang University, Hangzhou 310058, People's Republic of China.; Chen XJ; Department of Physics and Texas Center for Superconductivity, University of Houston, Houston TX 77204, United States of America.
- Source
- Publisher: IOP Pub Country of Publication: England NLM ID: 101165248 Publication Model: Electronic Cited Medium: Internet ISSN: 1361-648X (Electronic) Linking ISSN: 09538984 NLM ISO Abbreviation: J Phys Condens Matter Subsets: PubMed not MEDLINE; MEDLINE
- Subject
- Language
- English
Clathrate hydrideFm3-m-LaH 10 has been proven as the most extraordinary superconductor with the critical temperature T c above 250 K upon compression of hundreds of GPa in recent years. A general hope is to reduce the stabilization pressure and maintain the high T c value of the specific phase in LaH 10 . However, strong structural instability distortsFm3-mstructure and leads to a rapid decrease of T c at low pressures. Here, we investigate the phase stability and superconducting behaviors ofFm3-m-LaH 10 with enhanced chemical pre-compression through partly replacing La by Ce atoms from both experiments and calculations. For explicitly characterizing the synthesized hydride, we choose lanthanum-cerium alloy with stoichiometry composition of 1:1. X-ray diffraction and Raman scattering measurements reveal the stabilization ofFm3-m-La 0.5 Ce 0.5 H 10 in the pressure range of 140-160 GPa. Superconductivity with T c of 175 ± 2 K at 155 GPa is confirmed with the observation of the zero-resistivity state and supported by the theoretical calculations. These findings provide applicability in the future explorations for a large variety of hydrogen-rich hydrides.
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