Electronic phase diagram in the new BiS2-based Sr1-xLaxFBiS2 system

Abstract

In this paper, we systematically study the electron doping effect in a new BiS2-based system Sr1-xLaxFBiS2(0<x<0.7) through multiple techniques of X-ray diffraction, electrical transport, magnetic susceptibility, and Hall effect measurements. The parent compound SrFBiS2 is found to possess a semiconducting-like ground state, with thermally activation energy Eg=38 meV. By the partial substitution of La for Sr, superconductivity emerges when x > 0.3, reaching its maximal superconducting transition temperature Tc=3.5 K at x=0.55. In the normal state of superconducting samples, it is clearly seen that there exists a crossover from metallic to semiconducting state below a temperature Tmin, which shifts to lower temperatures with increasing La content. Based on these measurements, the associated electronic phase diagram of Sr1-xLaxFBiS2 system has thus been established.

10 pages, 6 figures

References in corpus (20)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Superconductivity in novel BiS2-based layered superconductor LaO1-xFxBiS2
• Novel BiS2-based layered superconductor Bi4O4S3
• Phase transitions in LaFeAsO: structural, magnetic, elastic, and transport properties, heat capacity and Mossbauer spectra
• Superconductivity Appears in the Vicinity of an Insulating-Like Behavior in CeO${}_{1-x}$F${}_x$BiS${}_2$
• Electron Correlations in the Low Carrier Density LaFeAsO0.89F0.11 Superconductor (Tc = 28 K)
• Minimal electronic models for superconducting BiS${}_2$ layers
• Ferroelectric Soft Phonons, Charge Density Wave Instability and Strong Electron-Phonon Coupling in BiS2-Layered 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)
• Evolution of superconductivity in LaO1-xFxBiS2 prepared by high pressure technique
• Appearance of superconductivity in new BiS2 based layered LaO0.5F0.5BiS2
• New layered fluorosulfide SrFBiS2
• Pairing with dominant triplet component and possible weak topological superconductivity in BiS${}_2$-based superconductors
• RPA Analysis of a Two-orbital Model for the BiS2-based Superconductors
• Strong coupling superconductivity and prominent superconducting fluctuations in the new superconductor Bi4O4S3
• Multi-Band Exotic Superconductivity in the New Superconductor Bi4O4S3
• Effect of Selenium doping on the superconductivity of Nb${}_2$Pd(S${}_{1-x}$Se${}_x$)${}_5$
• Evidence for two energy gaps and Fermi liquid behavior in SrPt${}_2$As${}_2$ superconductor

Cited by in corpus (11)

• Charge-density wave, superconductivity and $f$-electron valence instability in EuBiS${}_2$F
• Material Development and Physical Properties of BiS2-Based Layered Compounds
• Anomalous Eu Valence State and Superconductivity in Undoped Eu3Bi2S4F4
• Appearance of bulk Superconductivity under Hydrostatic Pressure in Sr0.5RE0.5FBiS2 (RE = Ce, Nd, Pr and Sm) compounds
• Coexistence of superconductivity and ferromagnetism in Sr0.5Ce0.5FBiS2
• Proximity to Fermi-surface topological change in superconducting LaO0.54F0.46BiS2
• Effect of hydrostatic pressures on the superconductivity of new BiS2 based REO0.5F0.5BiS2 (RE-La, Pr and Nd) superconductors
• Unusual mixed valence of Eu in two new materials EuSr2Bi2S4F4 and Eu2SrBi2S4F4: Mössbauer and X-ray photoemission Spectroscopy investigations
• Effect of yttrium substitution on the superconducting properties of the system La${}_{1-\text{x}}$Y${}_{\text{x}}$O${}_{0.5}$F${}_{0.5}$BiS${}_2$
• Testing the $d_{x^2-y^2}^{\ast }$-wave pairing symmetry by quasiparticle interference in BiS${}_2$-based superconductors
• Enhanced thermoelectricity by controlled local structure in bismuth-chalcogenides