Dimensional crossover in a spin-liquid-to-helimagnet quantum phase transition

2008/07/31 by V. Ovidiu Garlea, V. O. Garlea, A. Zheludev +7
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.79.060404

4 pages

arxiv created 2009/02/03 · openalex publication_date 2009/02/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Neutron scattering is used to study magnetic-field-induced ordering in the quasi-one-dimensional quantum spin-tube compound Sul-Cu₂Cl₄ that in zero field has a nonmagnetic spin-liquid ground state. The experiments reveal an incommensurate chiral high-field phase stabilized by a geometric frustration of the magnetic interactions. The measured critical exponents \ensuremathβ\ensuremath≈0.235 and \ensuremathν\ensuremath≈0.34 at H_c\ensuremath≈3.7 T point to an unusual subcritical scaling regime and may reflect the chiral nature of the quantum critical point.

Citations

• Bose–Einstein condensation in magnetic insulators
• Critical properties and Bose-Einstein condensation in dimer spin systems
• Ordering, metastability and phase transitions in two-dimensional systems