La<sub>2</sub>Rh<inline-formula><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi/><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math><inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="mfac972fieqn1.gif"></inline-graphic></inline-formula>Sb<sub>4</sub>: a new ternary superconducting rhodium-antimonide

Kangqiao Cheng; Wei Xie; Shuo Zou; Huanpeng Bu; Jin-Ke Bao; Zengwei Zhu; Hanjie Guo; Chao Cao; Yongkang Luo

doi:10.1088/2752-5724/ac972f

Volume 1 Issue 4

December 2022

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Article Contents

Kangqiao Cheng, Wei Xie, Shuo Zou, Huanpeng Bu, Jin-Ke Bao, Zengwei Zhu, Hanjie Guo, Chao Cao, Yongkang Luo. La2Rh3+δSb4: a new ternary superconducting rhodium-antimonide[J]. Materials Futures, 2022, 1(4): 045201. doi: 10.1088/2752-5724/ac972f

Citation:

Kangqiao Cheng, Wei Xie, Shuo Zou, Huanpeng Bu, Jin-Ke Bao, Zengwei Zhu, Hanjie Guo, Chao Cao, Yongkang Luo. La₂Rh

_{3 + δ}

Sb₄: a new ternary superconducting rhodium-antimonide[J]. Materials Futures, 2022, 1(4): 045201. doi: 10.1088/2752-5724/ac972f

Citation:

Kangqiao Cheng, Wei Xie, Shuo Zou, Huanpeng Bu, Jin-Ke Bao, Zengwei Zhu, Hanjie Guo, Chao Cao, Yongkang Luo. La₂Rh

_{3 + δ}

Sb₄: a new ternary superconducting rhodium-antimonide[J]. Materials Futures, 2022, 1(4): 045201. doi: 10.1088/2752-5724/ac972f

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La₂Rh $_{3 + δ}$ Sb₄: a new ternary superconducting rhodium-antimonide

Materials Futures, Volume 1, Number 4

Received Date: 2022-08-18
Accepted Date: 2022-10-02
Rev Recd Date: 2022-09-28
Publish Date: 2022-10-17

Article information

doi: 10.1088/2752-5724/ac972f

1.
Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
2.
Neutron Science Platform, Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, People’s Republic of China
3.
Department of Physics, Materials Genome Institute and International Center for Quantum and Molecular Structures, Shanghai University, Shanghai 200444, People’s Republic of China
4.
Center for Correlated Matter and School of Physics, Zhejiang University, Hangzhou 310058, People’s Republic of China
These authors contribute equally to this work.

More Information

Corresponding author: E-mail: hjguo@sslab.org.cn; E-mail: ccao@zju.edu.cn; E-mail: mpzslyk@gmail.com

Abstract

Abstract

Rhodium-containing compounds offer a fertile playground to explore novel materials with superconductivity (SC) and other fantastic electronic correlation effects. A new ternary rhodium-antimonide La₂Rh $_{3 + δ}$ Sb₄ ( $δ \approx 1 / 8$ ) has been synthesized by a Bi-flux method. It crystallizes in the orthorhombic Pr₂Ir₃Sb₄-like structure, with the space group Pnma (No. 62). The crystalline structure appears as stacking the two-dimensional RhSb₄- and RhSb₅-polyhedra networks along b axis, and the La atoms embed in the cavities of these networks. Band structure calculations confirm it as a multi-band metal with a van-Hove singularity like feature at the Fermi level, whose density of states are mainly of Rh-4d and Sb-5p characters. The calculations also imply that the redundant Rh acts as charge dopant. SC is observed in this material with onset transition at $T_{c}^{o n} \approx 0.8$ K. Ultra-low temperature magnetic susceptibility and specific heat measurements suggest that it is an s-wave type-II superconductor. Our work may also imply that the broad $L n_{2} T m_{3 + δ}$ Sb₄ (Ln = rare earth, Tm = Rh, Ir) family may host new material bases where new superconductors, quantum magnetism and other electronic correlation effects could be found.
- superconductivity,
- electronic correlation effect,
- crystalline structure

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References(40)

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