Single crystal growth and superconducting properties of LiFeAs

Abstract

We report the successful growth of high quality single crystals of LiFeAs with lateral sizes up to 5 x 5 mm2 by the Sn-flux method. Electrical resistivity studies reveal that the superconducting onset temperature is 18.2 K with a transition width less than 1.1 K and the ratio of room temperature to residual resistivity is about 24. Bulk superconductivity is supported by perfect shielding in the magnetic susceptibility and a clear jump in the specific heat Cp, resulting in deltaCp/T ~ 20.0 mJ/mol*K2. Upper critical field slopes of dHc2c/dT ~ -1.39 and dHc2ab/dT ~ -2.99 T/K near Tc predict zero temperature upper critical fields of Hc2c(0) ~ 17.2 and Hc2ab(0) ~ 36.9 T and coherence lengths of Xi_ab = 4.4 and Xi_c = 2.0 nm in a single band model. This result points to a modest superconducting anisotropy about 2.3 in LiFeAs.

arXiv comment18 pages, 4 figures

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Cited by in corpus (22)

• Superconductivity in Iron Compounds
• Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy
• Pauli-limiting effects in the upper critical fields of a clean LiFeAs single crystal
• Anisotropic upper critical field and a possible Fulde-Ferrel-Larkin-Ovchinnikov state in a stoichiometric pnictide superconductor LiFeAs
• Superconducting properties of sulfur-doped iron selenide
• Nodeless vs nodal order parameters in LiFeAs and LiFeP superconductors
• Orbital selective Fermi surface shifts and mechanism of high T${}_c$ superconductivity in correlated AFeAs (A=Li,Na)
• Multiorbital effects on the transport and the superconducting fluctuations in LiFeAs
• Determination of the Upper Critical Field of a Single Crystal LiFeAs: The Magnetic Torque Study up to 35 Tesla
• Resistivity and Hall effect of LiFeAs: Evidence for electron-electron scattering
• Contrasts in electron correlations and inelastic scattering between LiFeAs and LiFeP revealed by charge transport
• Specific Heat Discontinuity, deltaC, at Tc in BaFe2(As0.7P0.3)2 - Consistent with Unconventional Superconductivity
• Magnetic field - dependent Labusch parameter in LiFeAs superconductor from Campbell penetration depth
• Anomalous superconducting state in LiFeAs implied by the ${}^{75}$As Knight shift measurement
• Hund's metal crossover and superconductivity in the 111 family of iron-based superconductors
• Probing the Order Parameter of Superconducting LiFeAs using Pb/LiFeAs and Au/LiFeAs Point-Contact Spectroscopy
• Coexistence of Clean- and Dirty-limit Superconductivity in LiFeAs
• A Simple Mechanism for Unconventional Superconductivity in a Repulsive Fermion Model
• Specific Heat vs Field of LiFe1-xCuxAs
• Absence of hexagonal to square structural transition in LiFeAs vortex matter
• Anisotropy of the superconducting fluctuations in multiband superconductors: the case of LiFeAs
• High-pressure self-flux growth and characterization of Li-deficient Li0.95FeAs single crystals