The upper critical field in the BiCh2-based superconductors CeOBiS1.7Se0.3 and PrO0.5F0.5BiS2-xSex (x = 0, 0.3)

Abstract

We report the upper critical field (Bc2) in the BiCh2-based superconductors CeOBiS1.7Se0.3 and PrO0.5F0.5BiS2-xSex (x = 0, 0.3). Single crystals of CeOBiS1.7Se0.3 and PrO0.5F0.5BiS2-xSex (x = 0, 0.3) were grown using the flux method. Single-crystal structural analysis revealed that the crystal structure at room temperature is tetragonal (P4/nmm). Through electrical resistivity and magnetization measurements, bulk superconductivity was observed in all samples. For CeOBiS1.7Se0.3, the in-plane Bc2 is smaller than the conventional orbital limit and Pauli limit, suggesting that ferromagnetic ordering, which has been observed in a related Ce-containing BiCh2-based compound, affects Bc2 and superconductivity. In contrast, high in-plane Bc2 was observed for PrO0.5F0.5BiS2-xSex (x = 0, 0.3). We propose that the in-plane Bc2 is enhanced by antisymmetric spin-orbit coupling, which arises from the lack of local inversion symmetry.

arXiv comment20 pages, 9 figures, SI

References in corpus (37)

• Heavy fermion superconductivity and magnetic order in non-centrosymmetric $CeP{t}_{3}Si$
• Hidden spin polarization in inversion-symmetric bulk crystals
• Superconductivity in novel BiS2-based layered superconductor LaO1-xFxBiS2
• Novel BiS2-based layered superconductor Bi4O4S3
• Spin susceptibility in superconductors without inversion symmetry
• Ferroelectric Soft Phonons, Charge Density Wave Instability and Strong Electron-Phonon Coupling in BiS2-Layered Superconductors
• Extremely strong coupling superconductivity in artificial two-dimensional Kondo lattices
• Magnetoelectric effects in heavy-fermion superconductors without inversion symmetry
• Locally Non-centrosymmetric Superconductivity in Multilayer Systems
• 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
• Structural Analysis and Superconducting Properties of F-Substituted NdOBiS2 Single Crystals
• Material Development and Physical Properties of BiS2-Based Layered Compounds
• Anomalous Upper Critical Field in CeCoIn_5/YbCoIn_5 Superlattices with a Rashba-type Heavy Fermion Interface
• Coexistence of bulk superconductivity and ferromagnetism in CeO1-xFxBiS2
• Unexpected Giant Superconducting Fluctuation and Anomalous Semiconducting Normal State in NdO1-xFxBi1-yS2 Single Crystals
• Search and design of nonmagnetic centrosymmetric layered crystals with large local spin polarization
• Direct evidence of hidden local spin polarization in a centrosymmetric superconductor LaO${}_{0.55}$F${}_{0.45}$BiS${}_2$
• s-wave pairing in the optimally-doped LaO0.5F0.5BiS2 superconductor
• Evolution of superconductivity in BiS2-based superocnductor LaO0.5F0.5Bi(S1-xSex)2
• Magnetic Properties in Non-centrosymmetric Superconductors with and without Antiferromagnetic Order
• Pronounced - Log T Divergence in Specific Heat of Nonmetallic CeOBiS${}_2$: A Mother Phase of BiS${}_2$-Based Superconductor
• Evolution of Anisotropic Displacement Parameters and Superconductivity with Chemical Pressure in BiS2-Based REO0.5F0.5BiS2 (RE = La, Ce, Pr, and Nd)
• Site Selectivity on Chalcogen Atoms in Superconducting La(O,F)BiSSe
• Superconductivity in CeOBiS2 with cerium valence fluctuation
• Enhancement of Tc by uniaxial lattice contraction in BiS2-based superconductor PrO0.5F0.5BiS2
• Superconducting gap symmetry of the BiS${}_2$-based superconductor LaO${}_{0.5}$F${}_{0.5}$BiSSe elucidated through specific heat measurement
• Coexistence of ferromagnetism and superconductivity in CeO${}_{0.3}$F${}_{0.7}$BiS${}_2$
• Superconducting and magneto-transport properties of BiS2 based superconductor PrO1-xFxBiS2 (x = 0 to 0.9)
• BCS-like superconductivity in NdO${}_{1-x}$F${}_x$BiS${}_2$ ($x$ = 0.3 and 0.5) single crystals
• Theoretical aspects of the study on the new bismuth chalcogenide based superconductors
• C-axis electrical resistivity of PrO${}_{1-a}$F${}_a$BiS${}_2$ single crystals
• Anisotropic two-gap superconductivity and the absence of a Pauli paramagnetic limit in single-crystalline LaO${}_{0.5}$F${}_{0.5}$BiS${}_2$
• Superconducting gap structure in ambient-pressure-grown $\mathrm{La}{\mathrm{O}}_{0.5}{\mathrm{F}}_{0.5}\mathrm{Bi}{\mathrm{S}}_2$
• Superconductivity phase diagram of Se-substituted CeO0.5F0.5Bi(S1-xSex)2
• Bulk superconductivity induced by Se substitution in self-doped BiCh2-based compound CeOBiS2-xSex
• Investigation of superconducting properties and possible nematic superconductivity in self-doped BiCh2-based superconductor CeOBiS1.7Se0.3