# Enhanced Superconductivity in Close Proximity to the Structural Phase Transition of Sr1-xBaxNi2P2

## TL;DR

This study investigates how structural phase transitions in Sr1-xBaxNi2P2 influence its superconducting properties, revealing a peak Tc near the phase boundary and linking P-P dimer breaking to structural changes.

## Contribution

It provides new insights into the relationship between structural phase transitions and superconductivity in Sr1-xBaxNi2P2, highlighting the impact of P-P dimer breaking.

## Key findings

- Structural phase transition at x=0.5 from orthorhombic to tetragonal
- Maximum Tc of 2.85 K at x=0.4
- P-P dimers break during the phase transition

## Abstract

The structural evolution and superconductivity of a 122-type solid solution Sr1-xBaxNi2P2 were studied. We found that an orthorhombic-tetragonal structural phase transition takes place at x = 0.5, and is characterized by the P-P dimers breaking. The superconducting transition temperature exhibited its highest value of 2.85 K at x = 0.4.