2004/04/29 by N. B. Ivanov, Johannes Richter, J. Richter · 31 citations
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Diagonal #Ferrimagnetism #Ferromagnetism #Frustration #Geometry #Heisenberg model #Magnetic field #Magnetization #Mathematics #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Theoretical and Computational Physics #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.69.214420
published in Physical Review B 69(21) (American Physical Society) · 5 PRB pages, 7 eps figures, to appear in Phys. Rev. B
arxiv created 2004/04/29 · openalex publication_date 2004/06/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Using exact numerical diagonalization and the conformal field theory approach, we study the effect of magnetic frustrations due to diagonal exchange bonds in a system of two coupled mixed-spin (1,(1)/(2)) Heisenberg chains. It is established that relatively moderate frustrations are able to destroy the ferrimagnetic state and to stabilize the critical spin-liquid phase typical for half-integer-spin antiferromagnetic Heisenberg chains. Both phases are separated by a narrow but finite region occupied by a critical partially polarized ferromagnetic phase.