Among all the quantum manifestations of matter, quantum phase transitions – corresponding to an abrupt change in the ground state of a system at zero temperature due to quantum fluctuations when an external parameter such as a magnetic field or pressure is applied – are particularly exacerbated in 1D magnetic systems, where magnetic ions interact preferentially along one direction in space. Inelastic neutron scattering and numerical simulations allowed us to study such quantum transitions in the anisotropic antiferromagnetic chain compound BaCo2V2O8.
Publication: Phase transitions and spin dynamics of the quasi-one dimensional Ising-like antiferromagnet BaCo2V2O8 in a longitudinal magnetic field, S. Takayoshi et al., Phys. Rev. Research 5 (2023). https://doi.org/10.1103/PhysRevResearch.5.023205