2020/06/30 by Beom Hyun Kim, Shigetoshi Sota, Tomonori Shirakawa +3 · 13 citations
Engineering · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Density matrix renormalization group #Ferromagnetism #Heisenberg model #Magnetic field #Mathematics #Perovskite Materials and Applications #Phase (matter) #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum phase transition #Renormalization group #Spin (aerodynamics) #Spins #Zigzag #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.102.140402
published in Physical review. B./Physical review. B 102(14) (American Physical Society) · 6 pages, 3 figures, supplement material (7 pages, 8 figures)
openalex publication_date 2020/10/06 · arxiv created 2020/10/07 · arxiv updated 2020/10/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Motivated by the magnetic phase transition of a proximate Kitaev system \ensuremathα\ensuremath-RuCl3 in the presence of a magnetic field, we study the simplest but essential quantum spin model with the ferromagnetic nearest neighboring (NN) Kitaev interaction and additional antiferromagnetic third NN Heisenberg interaction. Employing both exact diagonalization and density matrix renormalization group methods, we demonstrate that the model shows the magnetic phase transition from the zigzag order phase to the spin polarized phase through an intermediate phase in both cases when an in-plane magnetic field is applied perpendicular to the NN bond direction and when an out-of-plane field is applied, in good agreement with experimental observations. Furthermore, we verify that additional symmetric off-diagonal \mathrm\ensuremathΓ interaction and ferromagnetic Heisenberg interaction between NN spins can both suppress the intermediate phase with the in-plane field. Our result gives important clues for determining relevant interactions in the field-induced magnetic phase transition of proximate Kiteav systems.