Superconductivity in the Medium-Entropy Alloy TiVNbTa with a Body-Centered Cubic Structure

Li，Kuan1; Hu，Xunwu2; Guo，Ruixin3,4; Jiang，Wenrui5; Zeng，Lingyong1; Li，Longfu1; Yu，Peifeng1; Wang，Kangwang1; Zhang，Chao1; Guo，Shu3,4; Zhong，Ruidan5; Xie，Tao2; Yao，Dao Xin2; Luo，Huixia1

2023-08-17

10.1021/acs.jpcc.3c04125

Journal of Physical Chemistry C   Impact Factor & Quartile

1932-7447

1932-7455

Here, we report the TiVNbTa medium-entropy alloy (MEA) superconductor with the mixed 3d-5d elements synthesized by an arc-melting method. The TiVNbTa material has a body-centered cubic structure with the cell parameter a = 3.2547(3) Å. The superconducting properties of TiVNbTa were studied by resistivity, magnetic susceptibility, and specific heat measurements. The experimental results show that the bulk superconducting phase transition temperature of TiVNbTa is about 4.65 K, and the upper and lower critical fields are 49.3(4) mT and 5.9(5) T, respectively, which indicates that TiVNbTa is a type-II superconductor. First-principles calculations show that the d electrons of Ti, V, Nb, and Ta atoms play a significant role near the Fermi level. The results show that TiVNbTa is a traditional s-wave superconductor (ΔC/γT = 1.60(2), λ = 0.76(3)).

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National Natural Science Foundation of China["12274471","11922415"] ; Guangdong Basic and Applied Basic Research Foundation["2022A1515011168","2019A1515011718"] ; Key Research and Development Program of Guangdong Province, China[2019B110209003] ; Leading Talent Program of Guangdong Special Projects["NKRDPC-2022YFA1402802","NKRDPC-2018YFA0306001","NSFC-11974432","NSFC-92165204"] ; Shenzhen International Quantum Academy[201626003] ; National Key Ramp;D Program of China[SIQA202102] ; Fundamental Research Funds for the Central Universities, Sun Yat-sen University[2021YFA1401600] ; null[23qnpy57]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001043202700001

AMER CHEMICAL SOC

2-s2.0-85168468405

Scopus

1.School of Materials Science and Engineering,State Key Laboratory of Optoelectronic Materials and Technologies,Key Lab of Polymer Composite & Functional Materials,Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices,Sun Yat-Sen University,Guangzhou,No. 135, Xingang Xi Road,510275,China
2.Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices,Center for Neutron Science and Technology,School of Physics,Sun Yat-Sen University,Guangzhou,510275,China
3.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.International Quantum Academy,Shenzhen,518048,China
5.Tsung-Dao Lee Institute & School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai,200240,China

Li，Kuan,Hu，Xunwu,Guo，Ruixin,et al. Superconductivity in the Medium-Entropy Alloy TiVNbTa with a Body-Centered Cubic Structure[J]. Journal of Physical Chemistry C,2023,127(32):16211-16218.

Li，Kuan.,Hu，Xunwu.,Guo，Ruixin.,Jiang，Wenrui.,Zeng，Lingyong.,...&Luo，Huixia.(2023).Superconductivity in the Medium-Entropy Alloy TiVNbTa with a Body-Centered Cubic Structure.Journal of Physical Chemistry C,127(32),16211-16218.

Li，Kuan,et al."Superconductivity in the Medium-Entropy Alloy TiVNbTa with a Body-Centered Cubic Structure".Journal of Physical Chemistry C 127.32(2023):16211-16218.