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Nature of quantum criticality in the Ising ferromagnet TbV6 Sn6

Journal Article · · Physical Review Research
DOI:https://doi.org/10.1103/jlnl-y35t· OSTI ID:3007498
 [1];  [1];  [2];  [1];  [3];  [1];  [4];  [2];  [1];  [5];  [2];  [1];  [1]
  1. Ames Laboratory, and Iowa State Univ., Ames, IA (United States)
  2. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  3. Ames Laboratory, and Iowa State Univ., Ames, IA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  4. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  5. Ames Laboratory, and Iowa State Univ., Ames, IA (United States); Univ. of Virginia, Charlottesville, VA (United States)
+ Show Author Affiliations
TbV6 Sn6 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 TbV6 Sn6 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.
Research Organization:
Ames Laboratory (AMES), Ames, IA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
89233218CNA000001; AC02-07CH11358
OSTI ID:
3007498
Alternate ID(s):
OSTI ID: 3011054
Report Number(s):
LA-UR--24-33406; 10.1103/jlnl-y35t; 2643-1564
Journal Information:
Physical Review Research, Journal Name: Physical Review Research Journal Issue: 4 Vol. 7; ISSN 2643-1564
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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