On charge and spin ordering in a one-dimensional model with frustrating interactions

2005/10/01 by M. S. Laad, Laad, M. S., Siddhartha Lal +1
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetism in coordination complexes #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.cond-mat/0510016

openalex publication_date 2005/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study a one-dimensional extended Hubbard model with longer-range Coulomb interactions at quarter-filling in the strong coupling limit. We find two different charge-ordered ground states as the strength of the longer range interactions is varied. At lower energies, these charge ordered states drive two different spin-ordered ground states. A variety of response functions computed here bear a remarkable resemblance to recent experimental observations for organic TMTSF systems, and so we propose that these systems are proximate to a quantum critical point (QCP) associated with T=0 charge order. For a ladder system relevant to Sr₁₄Cu₂₄O₄₁, we find in-chain charge order, rung-dimer, and orbital antiferromagnetic ordered phases with varying interchain couplings and superconductivity with hole-doping.

Related

• Ordering from frustration in a strongly correlated one-dimensional system
• Charge ordering in quasi-one-dimensional systems with frustrating interactions
• Superconductivity and Topological Numbers in the Hubbard Chain with Bond-Charge Interaction
• Effects of the Next-Nearest-Neighbor Hopping on the Low-Dimensional Hubbard Model: Ferromagnetism, Antiferromagnetism, and Superconductivity
• Binding of holes and competing spin-charge order in simple and extended Hubbard model on cylindrical lattice: An exact diagonalization study