Quasi-One-Dimensional Quantum Ferrimagnets

Abstract

We present an exact diagonalization study of the half-filled Hubbard model on bipartite quasi-one-dimensional lattices. In particular, we emphasize the dependence of the ferrimagnetic ground state properties, and its associated magnetic excitations, on the Coulomb repulsion U.

6 pages, 12 figures, to be published in Physica A: special issue in honor of Prof. Bernard Sapoval

References in corpus (9)

• Magnetization plateaus in spin chains: ``Haldane gap'' for half-integer spins
• From Nagaoka's ferromagnetism to flat-band ferromagnetism and beyond: An introduction to ferromagnetism in the Hubbard model
• Elementary Excitations of Heisenberg Ferrimagnetic Spin Chains
• Critical Behaviour of Mixed Heisenberg Chains
• Intrinsic double-peak structure of the specific heat in low-dimensional quantum ferrimagnets
• Bosonic representation of one-dimensional Heisenberg ferrimagnets
• Magnon dispersions in quantum Heisenberg ferrimagnetic chains at zero temperature
• Diagonal Ladders: A New Class of Models for Strongly Coupled Electron Systems
• Ground State of a Heisenberg Chain with Next-Nearest-Neighbor Bond Alternation

Cited by in corpus (9)

• Frustration-induced quantum phase transitions in a quasi-one-dimensional ferrimagnet: Hard-core boson map and the Ton ks-Girardeau limit
• Doped AB_2 Hubbard Chain: Spiral, Nagaoka and RVB States, Phase Separation and Luttinger Liquid Behavior
• Topology of many-body edge and extended quantum states in an open spin chain: 1/3--plateau, Kosterlitz-Thouless transition, and Luttinger liquid
• Quantum phase transitions in alternating spin-(1/2, 5/2) Heisenberg chains
• Low-energy structure of the intertwining double-chain ferrimagnets A_3_Cu_3_(PO_4_)_4_ (A=Ca,Sr,Pb)
• Ground-state phase diagram and thermodynamics of coupled trimer chains
• Magnetic and nonmagnetic phases in doped AB2 t-J Hubbard chains
• Quantum Rotors on the AB${}_2$ Chain with Competing Interactions
• Trimers in the Extended Hubbard Model