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Condensed Matter > Strongly Correlated Electrons

arXiv:2512.12234 (cond-mat)
[Submitted on 13 Dec 2025]

Title:Experimental benchmark of the quantum-classical crossover in a spin ladder

Authors:Hironori Yamaguchi, Itsuki Shimamura, Akira Matsuo, Koichi Kindo, Koji Araki, Yoshiki Iwasaki, Masayuki Hagiwara
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Abstract:We report a spin-(1/2, 5/2) three-leg ladder realized in a radical-Mn polymer, exhibiting an antiferromagnetic transition and magnetization curves accurately described by classical mean-field theory. Although the underlying spin model intrinsically supports strong quantum fluctuations, as confirmed by quantum Monte Carlo simulations, the real system shows an anomalously complete suppression of quantum behavior. These findings provide a key experimental benchmark for the quantum-classical crossover and suggest that lattice topology can play a crucial role in tuning the balance between quantum and classical physics in strongly correlated systems.
Comments: 6 pages, 4 figures
Subjects: Strongly Correlated Electrons (cond-mat.str-el); Materials Science (cond-mat.mtrl-sci); Quantum Physics (quant-ph)
Cite as: arXiv:2512.12234 [cond-mat.str-el]
  (or arXiv:2512.12234v1 [cond-mat.str-el] for this version)
  https://doi.org/10.48550/arXiv.2512.12234
Journal reference: Phys. Rev. B 112, 224419 (2025)
Related DOI: https://doi.org/10.1103/zkn9-5n6n

Submission history

From: Hironori Yamaguchi [view email]
[v1] Sat, 13 Dec 2025 08:16:54 UTC (3,059 KB)
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