Superconductivity in Se-doped La2O2Bi2Pb2S6-xSex with a Bi2Pb2Ch4-type thick conducting layer

Abstract

La2O2Bi2Pb2S6 is a layered Bi-based oxychalcogenide with a thick four-layer-type conducting layer. Although La2O2Bi2Pb2S6 is a structural analogue of La2O2Bi3AgS6, which is a superconductor, insulating behavior has been observed in La2O2Bi2Pb2S6 at low temperatures, and no superconductivity has been reported. Herein, we demonstrate superconductivity in La2O2Bi2Pb2S6-xSex via partial substitution of Se in the S sites. Owing to the Se doping, the normal state electrical resistivity of La2O2Bi2Pb2S6-xSex at low temperatures was dramatically suppressed, and superconductivity was observed at a transition temperature (Tc) of 1.15 K for x = 0.5. Tc increased with increasing Se concentration: Tc = 1.9 K for x = 1.0. The emergence of metallicity and superconductivity was explained via in-plane chemical pressure effects that can suppress local disorder and carrier localization, which are commonly observed in two-layer-type BiS2-based systems.

arXiv comment11 pages, 6 figures

References in corpus (29)

• To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report
• Superconductivity in novel BiS2-based layered superconductor LaO1-xFxBiS2
• Novel BiS2-based layered superconductor Bi4O4S3
• A review of Fe-chalcogenide superconductors: the simplest Fe-based superconductor
• Superconductivity Appears in the Vicinity of an Insulating-Like Behavior in CeO${}_{1-x}$F${}_x$BiS${}_2$
• Superconductivity of F-substituted LnOBiS2 (Ln = La, Ce, Pr, Nd, Yb) compounds
• Universal sheet resistance and revised phase diagram of the cuprate high-temperature superconductors
• Superconductivity induced by La doping in Sr1-xLaxFBiS2 system
• Superconductivity induced by electron doping in the system La1-xMxOBiS2 (M = Ti, Zr, Hf, Th)
• 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
• In-plane chemical pressure essential for superconductivity in BiCh2-based (Ch: S, Se) layered structure
• Material Development and Physical Properties of BiS2-Based Layered Compounds
• Anomalous Eu Valence State and Superconductivity in Undoped Eu3Bi2S4F4
• Superconductivity in a new layered bismuth oxyselenide: LaO0.5F0.5BiSe2
• In-plane Charge Fluctuations in Bismuth Sulfide Superconductors
• Impact of hydrostatic pressure on superconductivity of Sr0.5La0.5FBiS2
• Evolution of Anisotropic Displacement Parameters and Superconductivity with Chemical Pressure in BiS2-Based REO0.5F0.5BiS2 (RE = La, Ce, Pr, and Nd)
• Intrinsic Phase Diagram of Superconductivity in the BiCh2-based System Without In-plane Disorder
• Enhancement of Tc by uniaxial lattice contraction in BiS2-based superconductor PrO0.5F0.5BiS2
• Bulk Superconductivity Induced by In-plane Chemical Pressure Effect in Eu0.5La0.5FBiS2-xSex
• Electronic Origins of Large Thermoelectric Power Factor of LaOBiS2-xSex
• Effect of high pressure annealing on the normal state transport of LaO0.5F0.5BiS2
• Crystal structure, site selectivity, and electronic structure of layered chalcogenide LaOBiPbS3
• Superconductivity in layered Oxychalcogenide La2O2Bi3AgS6
• Synthesis, Crystal Structure, and Physical Properties of New Layered Oxychalcogenide La2O2Bi3AgS6
• Bulk Superconductivity Induced by Se Substitution in BiCh2-Based Layered Compounds Eu0.5Ce0.5FBiS2-xSex
• Superconductivity in La1-xCexOBiSSe: carrier doping by mixed valence of Ce ions
• Superconductivity and abnormal pressure effect in Sr0.5La0.5FBiSe2 superconductor

Cited by in corpus (2)

• Pressure tuning of localization and superconductivity in LaOPbBiS${}_3$ and La${}_2$O${}_2$Bi${}_3$AgS${}_6$
• Evaluation of insulating behavior by Pb Substitution and Pressure-Induced Superconductivity in La2O2Bi3-xPb1+xS6