Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd3P2(S1-x Se x )(8)

Li, Shuo1,2,3; Han, Shuo2,3; Yan, Shaohua2,3; Cui, Yi2,3; Wang, Le2,3; Wang, Shanmin4; Chen, Shanshan2,3; Lei, Hechang2,3; Yuan, Feng5; Zhang, Jinshan1; Yu, Weiqiang2,3

2022-06-01

10.1088/0256-307X/39/6/067404

CHINESE PHYSICS LETTERS   Impact Factor & Quartile

0256-307X

1741-3540

We performed high-pressure transport studies on the flat-band Kagome compounds, Pd3P2(S1 - x Se x )(8) (x = 0, 0.25), with a diamond anvil cell. For both compounds, the resistivity exhibits an insulating behavior with pressure up to 17 GPa. With pressure above 20 GPa, a metallic behavior is observed at high temperatures in Pd3P2S8, and superconductivity emerges at low temperatures. The onset temperature of superconducting transition T (C) rises monotonically from 2 K to 4.8 K and does not saturate with pressure up to 43 GPa. For the Se-doped compound Pd3P2(S0.75Se0.25)(8), the T (C) is about 1.5 K higher than that of the undoped one over the whole pressure range, and reaches 6.4 K at 43 GPa. The upper critical field with field applied along the c axis at typical pressures is about 50% of the Pauli limit, suggesting a 3D superconductivity. The Hall coefficient in the metallic phase is low and exhibits a peaked behavior at about 30 K, which suggests either a multi-band electronic structure or an electron correlation effect in the system.

SCI ; EI

English

Others

National Natural Science Foundation of China[51872328,12134020,12104503] ; National Key R&D Program of China["2018YFE0202600","2016YFA0300504"] ; Research Funds of Renmin University of China["18XNLG14","19XNLG13","19XNLG17","21XNLG18","18XNLG24"] ; China Postdoctoral Science Foundation[2020M680797] ; Beijing Natural Science Foundation[Z200005]

Physics

Physics, Multidisciplinary

WOS:000813912300001

IOP Publishing Ltd

PHYSICS

Web of Science

1.North China Elect Power Univ, Math & Phys Dept, Beijing 102206, Peoples R China
2.Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China
3.Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
5.Qingdao Univ, Coll Phys, Qingdao 266071, Peoples R China

Li, Shuo,Han, Shuo,Yan, Shaohua,et al. Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd3P2(S1-x Se x )(8)[J]. CHINESE PHYSICS LETTERS,2022,39(6).

Li, Shuo.,Han, Shuo.,Yan, Shaohua.,Cui, Yi.,Wang, Le.,...&Yu, Weiqiang.(2022).Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd3P2(S1-x Se x )(8).CHINESE PHYSICS LETTERS,39(6).

Li, Shuo,et al."Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd3P2(S1-x Se x )(8)".CHINESE PHYSICS LETTERS 39.6(2022).