2003/05/09 by M. T. Batchelor, Murray T. Batchelor, X. -W. Guan +7 · 9 citations
Mathematics · Physics and Astronomy · #Boundary (topology) #Boundary value problem #Condensed matter physics #Impurity #Integrable system #Mathematical analysis #Mathematical physics #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #Spin (aerodynamics) #Thermodynamics #cond-mat.stat-mech
paper · pdf · doi:10.1016/j.nuclphysb.2003.07.012
published in Nuclear Physics B 669(3), 385-416 (Elsevier BV) · 36 pages, 6 figures
arxiv created 2003/05/09 · openalex publication_date 2003/09/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
An integrable quantum spin ladder based on the SU(4) symmetry algebra with boundary defects is studied in the framework of boundary integrability. Five nontrivial solutions of the reflection equations lead to different boundary impurities. In each case the energy spectrum is determined using the quantum inverse scattering method. The thermodynamic properties are investigated by means of the thermodynamic Bethe ansatz. In particular, the susceptibility and the magnetization of the model in the vicinity of the critical points are derived along with differing magnetic properites for antiferromagnetic and ferromagnetic impurity couplings at the edges. The results are applicable to the strong coupling ladder compounds, such as Cu2(C5 H12 N2)2 Cl4.