Robust Tc in element molybdenum up to 160 GPa

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外文摘要：Element superconductors with the single atoms provide clean and fundamental platforms for studying superconduc-tivity.Although elements with d electrons are usually not favored by conventional BCS,the record superconducting critical temperature(Tc)in element scandium(Sc)has further ignited the intensive attention on transition metals.The element molybdenum(Mo)with a half-full d-orbital is studied in our work,which fills the gap in the study of Mo under high pres-sure and investigates the pressure dependence of superconductivity.In this work,we exhibit a robust superconductivity of Mo in the pressure range of 5 GPa to 160 GPa via high-pressure electrical transport measurements,the Tc varies at a rate of 0.013 K/GPa to 8.56 K at 160 GPa.Moreover,the superconductivity is evidenced by the Tc shifting to lower temperature under applied magnetic fields,and the upper critical magnetic fields are extrapolated by the WHH equation and GL equa-tion;the results indicate that the maximum upper critical magnetic field is estimated to be 8.24 T at 137 GPa.We further investigate the superconducting mechanism of Mo,the theoretical calculations indicate that the superconductivity can be attributed to the strong coupling between the electrons from the partially filled d band and the phonons from the frequency zone of 200-400 cm-1.

外文关键词：

molybdenumelement superconductorhigh pressuresuperconductivity

作者：

吴新月、郭淑敏、郭鉴宁、陈诉、王煜龙、张可欣、朱程程、刘晨晨、黄晓丽、段德芳、崔田

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作者单位：

State Key Laboratory of Superhard Materials,College of Physics,Jilin University,Changchun 130012,China

School of Physical Science and Technology,Ningbo University,Ningbo 315211,China

基金：

国家重点研发计划国家自然科学基金国家自然科学基金Program for Changjiang Scholars and Innovative Research Team in UniversityZhejiang Provincial Science and Technology Innovation Team

项目编号：

2022YFA14055005237225752072188IRT-15R232021R01004

出版年：

2024

DOI：

10.1088/1674-1056/ad2a78

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

年,卷(期)：2024.33(4)

参考文献量57