Finite-temperature scaling of spin correlations in an experimental realization of the one-dimensional Ising quantum critical point

M. Hälg (1) , D. Huevonen (1) , T. Guidi (2) , D. L. Quintero-Castro (3) , M. Boehm (4) , Louis Pierre Regnault (5) , M. Hagiwara (6) , A. Zheludev (1)

1 LNS - Laboratory for Neutron Scattering and Imaging [Paul Scherrer Institute]
2 RAL - STFC Rutherford Appleton Laboratory
3 HZB - Helmholtz-Zentrum Berlin für Materialien und Energie GmbH = Helmholtz Centre Berlin for Materials and Energy = Centre Helmholtz de Berlin pour les matériaux et l'énergie
4 ILL - Institut Laue-Langevin
5 MDN - Magnétisme et Diffusion Neutronique
6 Osaka University [Osaka]

Inelastic neutron scattering is used to study the finite-temperature scaling behavior of the local dynamic structure factor in the quasi-one-dimensional quantum antiferromagnet Ni[N, N'-bis(3-aminopropyl) propane-1,3-diamine](mu-NO2)ClO4 (NTENP), at its field-induced Ising quantum critical point. The validity and the limitations of the theoretically predicted scaling relations are tested.

Mots clés: Alternating Antiferromagnetic Chain; Critical Magnetic-Field; Phase Transition; Dynamics; NTENP

Domaines: Physique [physics]

M. Hälg, D. Huevonen, T. Guidi, D. L. Quintero-Castro, M. Boehm, et al.. Finite-temperature scaling of spin correlations in an experimental realization of the one-dimensional Ising quantum critical point. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, 92 (1), pp.014412. ⟨10.1103/PhysRevB.92.014412⟩. ⟨hal-01611027⟩