{
  "annotation_id": "2959e84c-1126-4351-a434-bcb9a590791b",
  "date_created": "2026-02-17T05:53:23.420000Z",
  "date_modified": "2026-02-17T05:53:23.420000Z",
  "file_hash": "87fc7665354db6846bad2fdbfc0b5c359a6588b0cf8f3383bc3c4305f9679020",
  "private": false,
  "record": {
    "abstract": "An $S=1$ Haldane chain is a one-dimensional (1D) quantum magnet where strong fluctuations result in quantum disordered singlet ground state with a gapped excitation spectrum. The gap magnitude is primarily set by the dominant intrachain interaction ($J_\\text{1D}$). An applied magnetic field closes the gap at $B_\\text{c1}$ and drives the system into a gapless Tomonaga-Luttinger liquid (TLL) regime, followed by, at lower temperatures, a Bose-Einstein condensate (BEC) ground state, persisting up to $B_\\text{c2} \\propto 4 J_\\text{1D}/g\\mu_B$. Almost all previously studied experimental realizations of such systems were based on transition-metal complexes which typically suffer from intrinsic anisotropies or large $J_\\text{1D}$ values, limiting the access to the full theoretical phase diagram. We report a comprehensive study of TLL and BEC phases in the organic Haldane chain system 3,5-bis(N-tert-butylaminoxyl)-3\u0027-nitrobiphenyl (BoNO). The absence of anisotropy and a moderate $J_\\text{1D}$ enable exploration of the complete $B-T$ phase diagram. Through $^1$H nuclear magnetic resonance, combined with theoretical analysis, we characterize the TLL properties, map the BEC phase boundary $T_c (B)$, determine the associated critical exponent $\\nu \\approx 0.66$ at $B_\\text{c2}$, and demonstrate universal quasiparticle scaling in the quantum-critical regime. These results provide full experimental validation of theoretical predictions for field-induced phases in an $S=1$ Haldane chain, made over two decades ago.",
    "arxiv_id": "2601.10489",
    "authors": [
      "I. Jakovac",
      "M. S. Grbi\u0107",
      "M. Dupont",
      "N. Laflorencie",
      "S. Capponi",
      "Y. Hosokoshi",
      "S. Kr\u00e4mer",
      "Y. Skourski",
      "S. Luther M. Takigawa",
      "M. Horvati\u0107"
    ],
    "categories": [
      "cond-mat.str-el"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "Magnetic field-induced phases in a model S=1 Haldane chain system",
    "url": "https://arxiv.org/abs/2601.10489",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d10d7456-f335-46b2-8691-11d3e489c4dd",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}