Superconductivity emerging from a pressurized van der Waals kagome material Pd₃P₂S₈

Journal article

Kagome materials have been reported to possess abundant and peculiar physical properties, which provide an excellent platform to explore exotic quantum states. We present a discovery of superconductivity in van der Waals material Pd _3 P _2 S _8 composed of Pd kagome lattice under pressure. Pd _3 P _2 S _8 displays superconductivity for those pressures where the semiconducting-like temperature dependence of the resistivity turns into a metallic one. Moreover, it is found that the increased pressure results in a gradual enhancement of superconducting transition temperature, which finally reaches 6.83 K at 79.5 GPa. Combining high-pressure x-ray diffraction, Raman spectroscopy and theoretical calculations, our results demonstrate that the observed superconductivity induced by high pressure in Pd _3 P _2 S _8 is closely related to the formation of amorphous phase, which results from the structural instability due to the enhanced coupling between interlayer Pd and S atoms upon compression

Authors: Wang, Q; Qiu, X-L; Pei, C; Gong, B-C; Gao, L

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IOP Publishing
• Journal: New Journal of Physics
• Volume: 25
• Issue: 4
• Pages: 043001-043001
• Publication date: 2023-03-17
• DOI: 10.1088/1367-2630/acc546
• EISSN: 1367-2630
• ISSN: 1367-2630
• Language: English
• Keywords: Amorphous solid; Raman spectroscopy; Metal; Condensed matter physics; Ambient pressure; Chemistry; van der Waals force; Molecule; Diffraction; Lattice (music); Van der Waals radius; Physics; Thermodynamics; Quantum mechanics; Electrical resistivity and conductivity; Superconductivity; Materials science; Instability; Crystallography