Emergence of superconductivity at 45 K by lanthanum and phosphorus co-doping of CaFe2As2

Kazutaka Kudo; Keita Iba; Masaya Takasuga; Yutaka Kitahama; Jun-ichi Matsumura; Masataka Danura; Yoshio Nogami; Minoru Nohara

doi:10.1038/srep01478

paper

Emergence of superconductivity at 45 K by lanthanum and phosphorus co-doping of CaFe2As2

arXiv:1303.4489 · doi:10.1038/srep01478

Abstract

Co-doping of lanthanum and phosphorus in CaFe2As2 induces superconductivity at 45 K. This superconducting transition temperature is higher than the 38 K transition in Ba1-xKxFe2As2, which is the maximum found thus far among the 122 phases. Superconductivity with a substantial shielding volume fraction was observed at 0.12 $\leq$ x $\leq$ 0.18 and y = 0.06 in Ca1-xLaxFe2(As1-yPy)2. The superconducting phase of the present system seems to be not adjacent to an antiferromagnetic phase.

arXiv comment13 pages, 4 figures

References in corpus (26)

Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO $_{1 - x}$ F $_{x}$ }
High-temperature superconductivity in iron-based materials
Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report
Determination of the phase diagram of the electron doped superconductor Ba(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$
Pressure-induced volume-collapsed tetragonal phase of CaFe2As2 as seen via neutron scattering
Reemerging superconductivity at 48 K across quantum criticality in iron chalcogenides
Superconductivity up to 30 K in the vicinity of quantum critical point in BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$
Competition and coexistence of antiferromagnetism and superconductivity in underdoped Ba(Fe0.953Co0.047)2As2
Superconductivity induced by Ni doping in BaFe $_{2}$ As $_{2}$
Superconductivity induced by phosphorus doping and its coexistence with ferromagnetism in EuFe $_{2}$ (As $_{0.7}$ P $_{0.3}$ ) $_{2}$
Superconductivity in SrFe_(2-x)Co_xAs_2: Internal Doping of the Iron Arsenide Layers
Two-dome structure in electron-doped iron arsenide superconductors
Lattice collapse and quenching of magnetism in CaFe2As2 under pressure: A single crystal neutron and x-ray diffraction investigation
Structural collapse and superconductivity in rare earth-doped CaFe2As2
The Unusual Superconducting State at 49 K in Electron-Doped CaFe2As2 at Ambient
Evolution of bulk superconductivity in SrFe2As2 with Ni substitution
Phase diagram of iron-arsenide superconductors Ca(Fe1-xCox)2As2 (0 <= x <= 0.2)
Abrupt recovery of Fermi-liquid transport by the c-axis collapse in CaFe2(As1-xPx)2 single crystals
Synthesis and properties of La-doped CaFe2As2 single crystals with Tc = 42.7 K
Structural properties and superconductivity of SrFe2As2-xPx and CaFe2As2-yPy
Interplay of Superconductivity and Fermi-Liquid Transport in Rh-Doped CaFe2As2 with Lattice-Collapse Transition
High Pressure Synthesis of Indirectly electron-doped 122 Iron Superconductor Sr1-xLaxFe2As2 with a maximum Tc = 22 K

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