Phase Diagram and Superconductivity: New Insight into the Fundamentals of InSn Bimetallic Alloys

2018-12-17T00:00:00Z (GMT) by Ashish C. Gandhi Sheng Yun Wu
We report the crystal structure and superconducting phase diagram for In<i><sub>p</sub></i>Sn<sub>1–<i>p</i></sub> (0.01 ≤ <i>p</i> ≤ 0.99) bimetallic alloys. A weak electron–phonon coupling was observed in intergranular linked InSn superconductors over an infinite range mediated by high-energy phonons. An enhanced <i>T</i><sub>C</sub>(0) ∼ 6.2 K and critical field <i>H</i><sub>C</sub>(0) ∼ 2.7 kOe were determined from intermediate (γ-Sn + β-InSn) composite alloys attributed to internal strain possibly originating from thermal expansion effect of constituent phases.