Pressure study on heavy fermion superconductor CeRh₂As₂

In the recently discovered heavy fermion superconductor CeRh₂As₂, a phase transition induced by magnetic field has been observed inside the superconducting state, which is proposed to be a transformation from a even-parity to odd-parity superconducting state. The odd-parity superconducting state and its large upper critical field have been explained based on local inversion symmetry breaking and consequent Rashba-like spin-orbit coupling. The normal state of CeRh₂As₂ exhibit non-Fermi-liquid behavior, indicating that it is close to a quantum critical point. Revealing the quantum critical point via tunning parameters such as chemical substitution and pressure will shed important light on the pairing mechanism of the odd-parity superconducting state. In this talk we will discuss our recent results on the phase diagram of CeRh₂As₂ under applied pressure.