Pressure phase diagram and quantum criticality of CePt2In7 single crystals

TL;DR

This study maps the temperature-pressure phase diagram of CePt2In7 single crystals, revealing the coexistence of antiferromagnetism and superconductivity, and suggests the presence of quantum criticality and textured superconductivity.

Contribution

It provides detailed insights into the pressure evolution of magnetic and superconducting phases in CePt2In7, highlighting differences from polycrystalline samples and identifying potential quantum critical behavior.

Findings

Superconductivity coexists with antiferromagnetism in a narrow pressure range.

Evidence of textured superconductivity and local quantum criticality.

Similarities with CeRhIn5 in quantum critical behavior.

Abstract

We report the temperature-pressure (T-P) phase diagram of CePt2In7 single crystals, especially the pressure evolution of the antiferromagnetic order and the emergence of superconductivity, which have been studied by electrical resistivity and ac calorimetry under nearly hydrostatic environments. Compared with its polycrystalline counterpart, bulk superconductivity coexists with antiferromagnetism in a much narrower pressure region. The possible existence of textured superconductivity and local quantum criticality also are observed in CePt2In7, exhibiting a remarkable similarity with CeRhIn5.