Robust Tc in element molybdenum up to 160 GPa

doi:10.1088/1674-1056/ad2a78

中国物理B ›› 2024, Vol. 33 ›› Issue (4): 47406-047406.doi: 10.1088/1674-1056/ad2a78

Robust T_c in element molybdenum up to 160 GPa

Xinyue Wu(吴新月)^1,†, Shumin Guo(郭淑敏)^1,†, Jianning Guo(郭鉴宁)¹, Su Chen(陈诉)¹, Yulong Wang(王煜龙)¹, Kexin Zhang(张可欣)¹, Chengcheng Zhu(朱程程)¹, Chenchen Liu(刘晨晨)¹, Xiaoli Huang(黄晓丽)^1,‡, Defang Duan(段德芳)¹, and Tian Cui(崔田)²

1 State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China;
2 School of Physical Science and Technology, Ningbo University, Ningbo 315211, China

收稿日期:2024-01-19 修回日期:2024-02-01 接受日期:2024-02-19 出版日期:2024-03-19 发布日期:2024-03-22
通讯作者: Xiaoli Huang E-mail:huangxiaoli@jlu.edu.cn
基金资助:
Project supported by the National Key R&D Program of China (Grant No. 2022YFA1405500), the National Natural Science Foundation of China (Grant Nos. 52372257 and 52072188), the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT-15R23), and the Zhejiang Provincial Science and Technology Innovation Team (Grant No. 2021R01004).

Robust T_c in element molybdenum up to 160 GPa

1 State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China;
2 School of Physical Science and Technology, Ningbo University, Ningbo 315211, China

Received:2024-01-19 Revised:2024-02-01 Accepted:2024-02-19 Online:2024-03-19 Published:2024-03-22
Contact: Xiaoli Huang E-mail:huangxiaoli@jlu.edu.cn
Supported by:
Project supported by the National Key R&D Program of China (Grant No. 2022YFA1405500), the National Natural Science Foundation of China (Grant Nos. 52372257 and 52072188), the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT-15R23), and the Zhejiang Provincial Science and Technology Innovation Team (Grant No. 2021R01004).

摘要/Abstract

摘要： Element superconductors with the single atoms provide clean and fundamental platforms for studying superconductivity. Although elements with d electrons are usually not favored by conventional BCS, the record superconducting critical temperature (T_c) 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 pressure 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 T_c varies at a rate of 0.013 K/GPa to 8.56 K at 160 GPa. Moreover, the superconductivity is evidenced by the T_c shifting to lower temperature under applied magnetic fields, and the upper critical magnetic fields are extrapolated by the WHH equation and GL equation; 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.

关键词: molybdenum, element superconductor, high pressure, superconductivity

Abstract: Element superconductors with the single atoms provide clean and fundamental platforms for studying superconductivity. Although elements with d electrons are usually not favored by conventional BCS, the record superconducting critical temperature (T_c) 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 pressure 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 T_c varies at a rate of 0.013 K/GPa to 8.56 K at 160 GPa. Moreover, the superconductivity is evidenced by the T_c shifting to lower temperature under applied magnetic fields, and the upper critical magnetic fields are extrapolated by the WHH equation and GL equation; 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.

Key words: molybdenum, element superconductor, high pressure, superconductivity

中图分类号: (Superconducting materials other than cuprates)

74.70.-b

62.50.-p (High-pressure effects in solids and liquids) 05.70.Fh (Phase transitions: general studies) 74.62.Bf (Effects of material synthesis, crystal structure, and chemical composition)

Xinyue Wu(吴新月), Shumin Guo(郭淑敏), Jianning Guo(郭鉴宁), Su Chen(陈诉), Yulong Wang(王煜龙), Kexin Zhang(张可欣), Chengcheng Zhu(朱程程), Chenchen Liu(刘晨晨), Xiaoli Huang(黄晓丽), Defang Duan(段德芳), and Tian Cui(崔田). Robust T_c in element molybdenum up to 160 GPa[J]. 中国物理B, 2024, 33(4): 47406-047406.

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Robust T_c in element molybdenum up to 160 GPa

Robust T_c in element molybdenum up to 160 GPa

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