High Tc superconductivity at a critical strain and charge density in diborides

Abstract

We report variation of lattice structure in diborides (AB2) with different A atoms to identify the special case of MgB2 showing high Tc superconductivity. High purity MgB2 (Tc~39 K) has been prepared by direct reaction of the elements and the lattice parameters are measured by x-ray diffraction determining the strain e of the B-B distance. The results show that the superconductivity in these intermetallics appear near a critical point in a two variables (strain and charge density) phase diagram at (ec, rc).

arXiv comment10 pages

References in corpus (5)

• Superconductivity of metallic boron in MgB_2
• Boron Isotope Effect in Superconducting MgB${}_2$
• Thermodynamic and Transport Properties of Superconducting $M{g}^{10}{B}_2$
• A Superconductor Made by a Metal Heterostructure at the Atomic Limit Tuned at the "Shape Resonance": MgB2
• Electronic and structural properties of superconducting diborides and calcium disilicide in the $\mathrm{Al}{\mathrm{B}}_2$ structure

Cited by in corpus (21)

• Band filling and interband scattering effects in MgB${}_2$: C vs Al doping
• Feshbach resonances and mesoscopic phase separation near a quantum critical point in multiband FeAs-based superconductors
• Sc substitution for Mg in MgB2: effects on Tc and Kohn anomaly
• Two-band Eliashberg equations and the experimental Tc of the diboride Mg1-xAlxB2
• Thermodynamics of Two - Band Superconductors: The Case of MgB${}_2$
• High-pressure synthesis of pure and doped superconducting MgB2 compounds
• Study of temperature dependent atomic correlations in MgB${}_2$
• Isotope effect on the E2g phonon and mesoscopic phase separation near the electronic topological transition in Mg1-xAlxB2
• Multi-Band Superconductivity and the Steep Band -- Flat Band Scenario
• RE L${}_3$ X-ray absorption study of REO${}_{1-x}$F${}_x$FeAs (RE=La, Pr, Nd, Sm) oxypnictides
• The road map toward room temperature superconductivity: manipulating different pairing channels in systems composed of multiple electronic components
• Spin-orbit coupling controlling the superconducting dome of artificial superlattices of quantum wells
• Resonant multigap superconductivity at room temperature near a Lifshitz topological transition in sulfur hydrides
• Strain induced orbital dynamics across the Metal Insulator transition in thin VO2/TiO2(001) films
• Electronic properties of curved few-layers graphene: a geometrical approach
• Multiple electronic components and Lifshitz transitions by oxygen wires formation in layered cuprates and nickelates
• Superconductivity in Quantum Complex Matter: the Superstripes Landscape
• Is Delta_{pi}-gap-only superconductivity possible in Mg_{1-x}Al_{x}B_{2} and Mg(B_{1-y}C_{y})_{2} alloys?
• Enhancing long-range order in disordered two-band s-wave superconductors
• A model for liquid-striped liquid phase separation in liquids of anisotropic polarons
• The Microstrain-Doping Phase Diagram of the Iron Pnictides Heterostructures at Atomic Limit