Emergent superconductivity in van der Waals Kagome material Pd3P2S8 under high pressure

Wang, Qi; Qiu, Xiao-Le; Pei, Cuiying; Gong, Ben-Chao; Gao, Lingling; Zhao, Yi; Cao, Weizheng; Li, Changhua; Zhu, Shihao; Zhang, Mingxin; Chen, Yulin; Li, Kai; Qi, Yue

doi:10.48550/arxiv.2204.05179

Cited by 3 publications

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“…As reported, the emergence of superconductivity depends on the pressure-induced structural transition from the crystalline to amorphous phase. [42,43] The emergence of the amorphous phase is consistent with our resistivity data, where large disorder is already observed in the low-pressure phase by the power-law temperature dependence of conductivity. At pressures above 20 GPa, however, the large carrier density may mask the power-law behavior in the conductivity.…”

supporting

confidence: 89%

“…Recently, two other studies [42,43] on Pd 2 P 2 S 8 also reported the pressure-induced superconductivity after this work, with 𝑇 C increasing monotonically with pressure. In Ref.…”

supporting

confidence: 66%

“…In fact, a pressure-induced amorphous phase is found by the XRD and Raman scattering, which emerges simultaneously with superconductivity. [42,43] The difference of 𝑇 C may be caused by the pressure transmission medium used in different groups, since the amorphous phase should rely sensitively on the pressure conditions, as revealed by the strong hysteresis of superconductivity with pressure. [42] The out-of-plane upper critical field of superconductivity is also studied by the resistivity measurements with field applied along the crystalline 𝑐 axis.…”

mentioning

confidence: 99%

“…Both 𝜌 𝑥𝑦 and 𝑅 H are calibrated by the high-pressure lattice parameters reported in Ref. [43]. 𝑅 H stays positive with temperatures from 200 K to 8 K, which suggests that the major carriers are the hole type in the system under pressure.…”

mentioning

confidence: 99%

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Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd₃P₂(S_{1 – x}Se_x)₈

Li¹,

Han²,

Yan³

et al. 2022

Chinese Phys. Lett.

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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.

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supporting

confidence: 89%

“…Recently, two other studies [42,43] on Pd 2 P 2 S 8 also reported the pressure-induced superconductivity after this work, with 𝑇 C increasing monotonically with pressure. In Ref.…”

supporting

confidence: 66%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd₃P₂(S_{1 – x}Se_x)₈

Li¹,

Han²,

Yan³

et al. 2022

Chinese Phys. Lett.

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“…It is very interesting that an amorphous phase of PdTeI could support SC. Other materials also show superconductivity under high pressure when the crystal structure change to an amorphous phase, such as Pd 3 P 2 S 8 [39,40], Bi 4 I 4 [41], (NbSe 4 ) 2 I [42], and (TaSe 4 ) 2 I [43,44]. Recently we learned that correlated disorder in the amorphous phase could be considered a way toward robust superconductivity [45].…”

Section: Resultsmentioning

confidence: 99%

Pressure-Induced Superconductivity in PdTeI with Quasi-One-Dimensional PdTe Chains

Zhao

Hou

et al. 2022

Crystals

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The quasi-one-dimensional material PdTeI exhibits unusual electronic transport properties at ambient pressure. Here, we systematically investigate both the structural and electronic responses of PdTeI to external pressure, through a combination of electrical transport, synchrotron X-ray diffraction (XRD), and Raman spectroscopy measurements. The charge density wave (CDW) order in PdTeI is fragile and the transition temperature TCDW decreases rapidly with the application of external pressure. The resistivity hump is indiscernible when the pressure is increased to ~1 GPa. Upon further compression, the resistivity dropping is observed approximately ~15 GPa and zero resistance is established above ~20 GPa, suggesting the occurrence of superconductivity. Combined XRD and Raman data evidence that the emergence of superconductivity is accompanied by a pressure-induced amorphization of PdTeI.

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Superconductivity and phase transitions in Kagome compound Pd₃P₂S₈ from first-principles calculation

Li,

Yang,

Fan

et al. 2023

J. Phys.: Condens. Matter

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Pd3P2S8 is a two-dimensional semiconductor that contains Kagome lattices, which exhibits various physical phenomena. Structural searches of Pd3P2S8 in the pressure range from 0 to 120 GPa have revealed two phases of the space group P-3m1 (designated as P-3m1-1 and P-3m1-2) and two phases of the space group C2/m (designated as C2/m-1 and C2/m-2), with all but C2/m-2 phase being dynamically stable. Electron-phonon calculations combined with Bardeen-Cooper-Schrieﬀer’s (BCS) argument have shown that both phases are superconductors. Notably, the P-3m1-1 phase undergoes a semiconductor-to-superconductor transition, with Tc increasing up to a maximum of 9.13 K at 70 GPa. Both C2/m-1 and P-3m1-2 phases exhibit superconductivity at 0 GPa. Our calculations demonstrate several new superconducting phases of Pd3P2S8, providing a pathway and platform for exploring superconductivity in materials with Kagome lattices and expanding the options for studying such lattices.

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Emergent superconductivity in van der Waals Kagome material Pd3P2S8 under high pressure

Cited by 3 publications

References 0 publications

Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd₃P₂(S_{1 – x}Se_x)₈

Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd₃P₂(S_{1 – x}Se_x)₈

Pressure-Induced Superconductivity in PdTeI with Quasi-One-Dimensional PdTe Chains

Superconductivity and phase transitions in Kagome compound Pd₃P₂S₈ from first-principles calculation

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Emergent superconductivity in van der Waals Kagome material Pd3P2S8 under high pressure

Cited by 3 publications

References 0 publications

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

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

Pressure-Induced Superconductivity in PdTeI with Quasi-One-Dimensional PdTe Chains

Superconductivity and phase transitions in Kagome compound Pd3P2S8 from first-principles calculation

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Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd₃P₂(S_{1 – x}Se_x)₈

Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd₃P₂(S_{1 – x}Se_x)₈

Superconductivity and phase transitions in Kagome compound Pd₃P₂S₈ from first-principles calculation