Magnetism, Superconductivity and Quantum Criticality in the Multi-Site Cerium Heavy Fermion Compound Ce3PtIn11

TL;DR

This study explores the magnetic, superconducting, and quantum critical behaviors of Ce3PtIn11, a heavy fermion compound, under ambient and pressure conditions, revealing coexistence of magnetic order and superconductivity and mapping its phase diagram.

Contribution

It provides the first detailed thermodynamic and transport analysis of Ce3PtIn11, highlighting its complex phase diagram and coexistence phenomena due to inequivalent Ce-sites.

Findings

Two magnetic transitions at 2.2 K and 2 K under ambient pressure.

Superconductivity emerges below 0.32 K coexisting with magnetic order.

Pressure modifies the phase diagram, revealing quantum critical behavior.

Abstract

The properties of the novel heavy fermion superconductor Ce$_3$PtIn$_{11}$ are investigated by thermodynamic and transport measurements at ambient and under hydrostatic pressure. At ambient pressure the compound exhibits two successive magnetic transitions at $T_1$ $\approx$ 2.2 K and $T_{\rm N}$ $\approx$ 2 K into antiferromagnetically ordered states and enters into a heavy fermion superconducting phase below $T_{\rm c}$ $\approx$ 0.32 K. The coexistence of long-range magnetic order and superconductivity is discussed in the context of the existence of the two crystallographically inequivalent Ce-sites in the unit cell of Ce$_3$PtIn$_{11}$. The experimental data allow us to construct the pressure-temperature phase diagram.