Abstract
[Ni(HF2)(3-Clpyradine)4]BF4 (NBCT) is a one-dimensional, S=1 spin-chain material that shows no long-range magnetic order down to thermometer temperatures of 0.1 K. Previous ambient pressure inelastic neutron scattering experiments identified NBCT to be in the large-D quantum paramagnetic phase of the D/J phase diagram, where D is the axial single-ion anisotropy and J is the intrachain superexchange. Here, we extend the previous experiments to a hydrostatic pressure of 0.9 GPa. By comparing to density matrix renormalization group calculations, we find D/J increases from 1.5 to 3.2 as pressure increases from 0 GPa to 0.9 GPa, which pushes the system further into the large-D phase.
| Original language | English |
|---|---|
| Article number | 134420 |
| Journal | Physical Review B |
| Volume | 105 |
| Issue number | 13 |
| DOIs | |
| State | Published - Apr 1 2022 |
Funding
D.M.P. and A.P.P. are supported through the Scientific User Facilities Division of the DOE Office of Science, sponsored by the Basic Energy Science (BES) Program, DOE Office of Science. J. H. acknowledges grant support by the Polish National Agency for Academic Exchange (NAWA) under contract No. PPN/PPO/2018/1/00035. We acknowledge Mark W. Meisel for discussions and for sharing unpublished high-pressure data and Gonzalo Alvarez for developing the DMRG++ code . This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. This manuscript has been authored by UT-Battelle, LLC under contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The U.S. Government retains and the publisher, by accepting the article for publication, acknowledges that the U.S. Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or to allow others to do so, for U.S. Government purposes.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | |
| Office of Science | |
| Basic Energy Sciences | |
| Narodowa Agencja Wymiany Akademickiej | DE-AC05-00OR22725, PPN/PPO/2018/1/00035 |