2005/06/10 by Hiroaki Onishi, Takashi Hotta · 1 citation
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Atomic orbital #Condensed matter physics #Degenerate energy levels #Density matrix renormalization group #Electron #Frustration #Geometry #Mathematics #Molecular orbital #Molecule #Non-bonding orbital #Physics #Physics of Superconductivity and Magnetism #Quantum many-body systems #Quantum mechanics #Renormalization group #Spin (aerodynamics) #Zigzag #cond-mat.str-el
paper · pdf · doi:10.1016/j.physb.2006.01.157
published in Physica B Condensed Matter 378-380, 589-591 (Elsevier BV) · 2 pages, 1 figure, Proceedings of SCES'05 (July 26-30, 2005, Vienna)
arxiv created 2005/06/10 · openalex publication_date 2006/02/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the ground-state property of an eg-orbital Hubbard model at quarter filling on a zigzag chain by exploiting the density matrix renormalization group method. When two orbitals are degenerate, the zigzag chain is decoupled to a doble-chain spin system to suppress the spin frustration due to the spatial anisotropy of the occupied orbital. On the other hand, when the level splitting is increased and the orbital anisotropy disappears, a characteristic change in the spin incommnsurability is observed due to the revival of the spin frustration.