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Inelastic neutron scattering study of the anisotropic S=1 spin chain [Ni(HF2)(3Clpyridine) 4 ]BF4

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4];  [1];  [5];  [5]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Eastern Washington Univ., Cheney, WA (United States)
  3. Wrocław Univ. of Science and Technology (Poland); Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Univ. of Copenhagen (Denmark)
  5. Univ. of Florida, Gainesville, FL (United States)
[Ni(HF2)(3–Clpyridine)4]BF4 (NBCT) is a one-dimensional, S = 1 spin chain material that shows no magnetic neutron Bragg peaks down to temperatures of 0.1 K. Previous work identified NBCT as being in the Haldane phase and near a quantum phase transition as a function of D/J to the large-D quantum paramagnet phase (QPM), where D is the axial single-ion anisotropy and J is the intrachain superexchange. Herein, inelastic neutron scattering results are presented on partially deuterated, 11B-enriched NBCT polycrystalline samples in zero magnetic field and down to temperatures of 0.3 K. Comparison to density matrix renormalization group calculations yields D/J = 1.51 and a significant rhombic single-ion anisotropy E (E/D ≈ 0.03, E/J ≈ 0.05). Here, these D, J, and E values place NBCT in the large-D QPM phase but precipitously near a quantum phase transition to a long-range ordered phase.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
National Science Foundation; National Science Foundation Cooperative; Polish National Agency of Academic Exchange (NAWA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1606713
Alternate ID(s):
OSTI ID: 1606615
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 9 Vol. 101; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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