Magnetic Phase Diagram of Li_2(Pd_{1-x}Pt_x)_3B by AC Susceptometry

Abstract

The H-T phase diagram and several superconducting parameters for Li_2(Pd_{1-x}Pt_x)_3B have been determined as a function of cation substitution x. Notably, the coherence length may be linear in platinum concentration. Despite the superconducting pairing state and band structure apparently changing fundamentally, the H-T phase diagram is essentially unchanged. Unusual aspects of the shape of the H-T phase diagram are discussed. The upper critical field H_c2(0) is not anomalously high for any Pt content, likely due to an absence of high carrier masses - in such a case, the value of H_c2(0) would not serve as a probe for novel physics.

5 pages, 6 figures

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• Abrupt enhancement of non-centrosymmetry and appearance of the spin-triplet superconducting state in Li_2(Pd_{1-x}Pt_{x})_3B beyond x=0.8
• Evidence of Nodal Line in the Superconducting Gap Symmetry of Noncentrosymmetric ThCoC${}_2$
• Superconductivity induced by fluctuations of momentum-based multipoles
• Phonon anomaly and anisotropic superconducting gap in non-centrosymmetric Li2(Pd1-xPtx)3B
• Pressure study of the noncentrosymmetric 5d-electron superconductors CaMSi3 (M= Ir, Pt)
• Experimental and first-principles studies of superconductivity in topological nodal line semimetal SnTaS${}_2$
• Spin Susceptibility in Non-centrosymmetric Superconductors with Topological Transition of Fermi Surfaces
• Phase diagrams of noncentrosymmetric superconductors
• Temperature Dependence of the Spin Susceptibility in Noncentrosymmetric Superconductors with Line Nodes