Superconductivity in CeOBiS2 with cerium valence fluctuation

Abstract

Resistivities of single-crystalline as well as poly-crystalline samples of CeOBiS2 without fluorine doping were measured at temperatures down to 0.13 K, and were compared with those of poly-crystalline LaOBiS2 and PrOBiS2. Both poly-crystalline and single-crystalline CeOBiS2 exhibited zero resistivity below 1.2 K while poly-crystalline LaOBiS2 and PrOBiS2 did not show zero resistivity down to 0.13 K. Superconducting transition temperature of CeOBiS2 was reduced by increasing the applied current density. The superconductivity of CeOBiS2 without chemical doping is likely triggered by the carriers induced by the valence fluctuation between Ce3+ and Ce4+.

arXiv comment19 pages, 5 figures in Solid State Communications 2016

References in corpus (13)

• Superconductivity in diamond
• Superconductivity in novel BiS2-based layered superconductor LaO1-xFxBiS2
• Superconducting Properties of MgB2 Bulk Materials Prepared by High Pressure Sintering
• 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
• Charge-density wave, superconductivity and $f$-electron valence instability in EuBiS${}_2$F
• Structural Analysis and Superconducting Properties of F-Substituted NdOBiS2 Single Crystals
• Anomalous Eu Valence State and Superconductivity in Undoped Eu3Bi2S4F4
• Growth and superconducting properties of F-substituted ROBiS2 (R = La, Ce, Nd) single crystals
• Role of the Ce valence in the coexistence of superconductivity and ferromagnetism of CeO${}_{1-x}$F${}_x$BiS${}_2$ revealed by Ce $L_3$-edge x-ray absorption spectroscopy
• Specific heat and electronic states of superconducting boron-doped silicon carbide
• Pronounced - Log T Divergence in Specific Heat of Nonmetallic CeOBiS${}_2$: A Mother Phase of BiS${}_2$-Based Superconductor
• Structures and Optical Absorption of Bi2OS2 and LaOBiS2

Cited by in corpus (15)

• Material Development and Physical Properties of BiS2-Based Layered Compounds
• Improvement of superconducting properties by high mixing entropy at blocking layers in BiS2-based superconductor REO0.5F0.5BiS2
• Superconductivity and its Enhancement under High Pressure in "F-free" Single Crystals of CeOBiS${}_2$
• Synthesis, Crystal Structure, and Thermoelectric Properties of Layered Antimony Selenides REOSbSe2 (RE = La, Ce)
• A Heavy-Fermion Zn-deficient CaBe2Ge2-Type Phase with Rare Ce-based Ferromagnetism and Large Magnetoresistance
• Growth of superconducting Sm(O,F)BiS2 single crystals
• Growth and characterization of (La,Ce)OBiS2 single crystals
• Effects of equivalent composition on superconducting properties of high-entropy REOBiS${}_2$ (RE = La, Ce, Pr, Nd, Sm, Gd) single crystals
• Growth and transport properties under high pressure of PrOBiS2 single crystals
• Investigation of superconducting properties and possible nematic superconductivity in self-doped BiCh2-based superconductor CeOBiS1.7Se0.3
• Bulk superconductivity induced by Se substitution in self-doped BiCh2-based compound CeOBiS2-xSex
• Suppression of superconductivity by Sb-substitution into CeOBiS2 single crystals
• Investigation of superconductivity in Ce-doped (La,Pr)OBiS2 single crystals
• Superconducting phase diagram of Sb and Se substitution in CeOBiS2 single crystals
• The upper critical field in the BiCh2-based superconductors CeOBiS1.7Se0.3 and PrO0.5F0.5BiS2-xSex (x = 0, 0.3)