Pressure-enhanced superconductivity in Eu${}_3$Bi${}_2$S${}_4$F${}_4$

Abstract

The pressure effect on the newly discovered charge-transferred BiS${}_2$-based superconductor, Eu${}_3$Bi${}_2$S${}_4$F${}_4$, with a $T_c$ of 1.5 K at ambient pressure, is investigated by transport and magnetic measurements. Accompanied with the enhancement of metallicity under pressures, the onset superconducting transition temperature increases abruptly around 1.0 GPa, reaching $\sim$10.0 K at 2.26 GPa. AC magnetic susceptibility measurements indicate that a new superconducting phase with a higher $T_c$ emerges and dominates at high pressures. In the broad pressure window of 0.68 GPa$\le$$p$$\le$2.00 GPa, the high-$T_c$ phase coexists with the low-$T_c$ phase. Hall effect measurements reveal a significant difference in electronic structures between the two superconducting phases. Our work devotes the effort to establish the commonality of pressure effect on the BiS${}_2$-based superconductors, and also uncovers the importance of electron carrier density in the high-$T_c$ phase.

arXiv comment5 figures

References in corpus (15)

• Superconductivity in novel BiS2-based layered superconductor LaO1-xFxBiS2
• Novel BiS2-based layered superconductor Bi4O4S3
• Superconductivity Appears in the Vicinity of an Insulating-Like Behavior in CeO${}_{1-x}$F${}_x$BiS${}_2$
• Minimal electronic models for superconducting BiS${}_2$ layers
• Superconductivity of F-substituted LnOBiS2 (Ln = La, Ce, Pr, Nd, Yb) compounds
• Superconductivity induced by La doping in Sr1-xLaxFBiS2 system
• Pressure-induced Enhancement of Superconductivity in BiS${}_2$-layered LaO${}_{1-x}$F${}_x$BiS${}_2$
• Charge-density wave, superconductivity and $f$-electron valence instability in EuBiS${}_2$F
• Pressure-induced enhancement of superconductivity and suppression of semiconducting behavior in Ln(O0.5F0.5)BiS2 (Ln = La, Ce) compounds
• Anomalous Eu Valence State and Superconductivity in Undoped Eu3Bi2S4F4
• Growth and superconducting properties of F-substituted ROBiS2 (R = La, Ce, Nd) single crystals
• Superconductivity in a new layered bismuth oxyselenide: LaO0.5F0.5BiSe2
• Enhancement of superconductivity near the pressure-induced semiconductor-metal transition in BiS2-based compounds LnO(0.5)F(0.5)BiS2 (Ln = La, Ce, Pr, Nd)
• Anisotropic upper critical field of BiS2-based superconductor LaO0.5F0.5BiS2
• Pressure Tuned Enhancement of Superconductivity and Change of Ground State Properties in LaO0.5F0.5BiSe2 Single Crystals

Cited by in corpus (10)

• Material Development and Physical Properties of BiS2-Based Layered Compounds
• Unusual mixed valence of Eu in two new materials EuSr2Bi2S4F4 and Eu2SrBi2S4F4: Mössbauer and X-ray photoemission Spectroscopy investigations
• Pressure-Induced Phase Transition in La${}_{1-x}$Sm${}_x$O${}_{0.5}$F${}_{0.5}$BiS${}_2$
• Strong bilayer coupling induced by the symmetry breaking in the monoclinic phase of BiS${}_2$-based superconductors
• Superconductivity and abnormal pressure effect in Sr0.5La0.5FBiSe2 superconductor
• Upper critical magnetic field of $Ln$O${}_{0.5}$F${}_{0.5}$BiS${}_2$ ($Ln$ = La, Nd) superconductors at ambient and high pressure
• Pressure Effects on Superconducting Properties of the BiS2-Based Superconductor Bi2(O,F)S2
• Pressure-induced enhancement of two-dimensionality in LaO1-xFxBi(Se/S)2 superconductors
• Pressure induced superconductivity bordering a charge-density-wave state in NbTe4 with strong spinorbit coupling
• Orientation-dependent superconductivity and electronic structure of the rare-earth metal/KTaO3 interfaces