Doping-dependent magnetization plateaus of a coupled spin-electron chain: exact results

Abstract

A coupled spin-electron chain composed of localized Ising spins and mobile electrons is exactly solved in an external magnetic field within the transfer-matrix method. The ground-state phase diagram involves in total seven different ground states, which differ in the number of mobile electrons per unit cell and the respective spin arrangements. A rigorous analysis of the low-temperature magnetization process reveals doping-dependent magnetization plateaus, which may be tuned through the density of mobile electrons. It is demonstrated that the fractional value of the electron density is responsible for an enhanced magnetocaloric effect due to an annealed bond disorder of the mobile electrons.

arXiv comment14 pages, 4 figures

References in corpus (14)

• Magnetization plateaus in spin chains: ``Haldane gap'' for half-integer spins
• Magnetization Plateaux in N-Leg Spin Ladders
• Magnetization plateaus in frustrated antiferromagnetic quantum spin models
• Magnetic Properties of the Spin-1/2 Ferromagnetic-Ferromagnetic-Antiferromagnetic Trimerized Heisenberg Chain:
• Magnetization plateau in S=3/2 antiferromagnetic Heisenberg chain with anisotropy
• Magnetization plateau in a two-dimensional multiple-spin exchange model
• Zeeman effect in superconducting two-leg ladders: irrational magnetization plateaus and exceeding the Pauli limit
• Emergence of Irrationality: Magnetization Plateaux in Modulated Hubbard Chains
• Doping-dependent magnetization plateaux in p-merized Hubbard chains
• Bosonization and density-matrix renormalization group studies of Fulde-Ferrell-Larkin-Ovchinnikov phase and irrational magnetization plateaus in coupled chains
• Doping Induced Magnetization Plateaus
• Topological incommensurate magnetization plateaus in quasi-periodic quantum spin chains
• Combined analytical and numerical approach to study magnetization plateaux in doped quasi-one-dimensional antiferromagnets
• Hubbard ladders in a magnetic field

Cited by in corpus (5)

• Magnetization processes and existence of reentrant phase transitions in coupled spin-electron model on doubly decorated planar lattices
• Magnetization plateau as a result of the uniform and gradual electron doping in a coupled spin-electron double-tetrahedral chain
• Influence of applied electric and magnetic fields on a thermally-induced reentrance of a coupled spin-electron model on a decorated square lattice
• On the ground-state degeneracy and entropy in a double-tetrahedral chain formed by the localized Ising spins and mobile electrons
• Insights into Magnetic Properties of a Mixed Spin-Electron Model on Decorated Planar Lattices Composed of Half-filled Trigonal Bipyramids