Nature of quantum criticality in the Ising ferromagnet TbV 6 Sn 6
Year: 2025
Type: article
Abstract: TbV 6 Sn 6 is a topological metal where ferromagnetic Tb ions with strong uniaxial magnetic anisotropy interact with V kagome layers. Inelastic neutron scattering (INS) measurements show that the Tb ions adopt an Ising doublet ground state. Here, we consider whether a transverse magnetic field can drive TbV 6 Sn 6 toward a quantum critical point, providing a rare example of transverse-field Ising criticality in a metallic compound. High-field magnetization measurements reveal a first-order-like spin-reorientation transition at 25.6 T. Our INS-based magnetic model finds that this is caused by an avoided crossing of an excited-state singlet with the ground-state doublet. Surprisingly, our model predicts that quantum critical and tricritical points are accessible within the range of experimentally determined model parameters and may be reached by varying the direction of an applied magnetic field.
Source: Physical Review Research
DOI: 10.1103/jlnl-y35t
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Funders: National Science Foundation, U.S. Department of Energy, Iowa State University, National High Magnetic Field Laboratory, Office of Science, Division of Materials Research, Basic Energy Sciences, High Magnetic Field Laboratory, Chinese Academy of Sciences, Oak Ridge National Laboratory, Ames Laboratory, Energy Frontier Research Centers
OpenAlex ID: W4416780483