Quantum ferromagnet in the proximity of the tricritical point

Abstract

Echoes of quantum phase transitions (QPTs) at finite temperatures are theoretically and experimentally challenging and unexplored topics. Particularly in metallic quantum ferromagnets the experimental investigations are hampered by an intricate preparation of sufficiently pure samples and the access to the proper coordinates in parameter space. The present study shows that it is possible to tune a specific system at easily accessible conditions to the vicinity of its quantum phase transition. The physics is demonstrated on Ru-doped UCoAl, driven by pressure or substitution to and across the tricritical point and follows the first-order transition line to the theoretically presumed QPT. These findings open the possibilities for further in-depth studies of classical and quantum critical phenomena at easily reachable conditions.

References in corpus (15)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Metallic Quantum Ferromagnets
• Quantum criticality in ferroelectrics
• First order transitions and multicritical points in weak itinerant ferromagnets
• Tricritical behavior in itinerant quantum ferromagnets
• Metal to insulator quantum-phase transition in few-layered ReS${}_2$
• Quantum criticality in a metallic spin liquid
• Ferromagnetic Quantum Critical Endpoint in UCoAl
• Emergent Novel Metallic State in a Disordered 2D Mott Insulator
• Universal low-temperature tricritical point in metallic ferromagnets and ferrimagnets
• Volume-wise destruction of the antiferromagnetic Mott insulating state through quantum tuning
• Unconventional Strong Spin-Fluctuation Effects around the Critical Pressure of the Itinerant Ising-Type Ferromagnet URhAl
• Pressure-induced quantum phase transition in the itinerant ferromagnet UCoGa
• Droplet formation near first-order phase transitions: A mechanism for heterogeneity and phase separation away from the coexistence curve

Cited by in corpus (5)

• Critical behavior of magnetization in URhAl:Quasi-two-dimensional Ising system with long-range interactions
• Dramatic elastic response at the critical end point in UTe${}_2$
• Magnon excitations and quantum critical behavior of the ferromagnet U${}_4$Ru${}_7$Ge${}_6$
• Different universality classes of isostructural U$TX$ compounds ($T$ = Rh, Co, Co${}_{0.98}$Ru${}_{0.02}$; $X$ = Ga, Al)
• Electrical resistivity across the tricriticality in itinerant ferromagnet