Magnetization plateau as a result of the uniform and gradual electron doping in a coupled spin-electron double-tetrahedral chain

Abstract

The double-tetrahedral chain in a longitudinal magnetic field, whose nodal lattice sites occupied by the localized Ising spins regularly alternate with triangular plaquettes with the dynamics described by the Hubbard model, is rigorously investigated. It is demonstrated that the uniform change of electron concentration controlled by the chemical potential in a combination with the competition between model parameters and the external magnetic field leads to the formation of one chiral and seven non-chiral phases at the absolute zero temperature. Rational plateaux at one-third and one-half of the saturation magnetization can also be identified in the low-temperature magnetization curves. On the other hand, the gradual electron doping results in eleven different ground-state regions which distinguish from each other by the evolution of the electron distribution during this process. Several doping-dependent magnetization plateaux are observed in the magnetization process as a result of the continuous change of electron content in the model.

18 pages, 7 figures

References in corpus (19)

• Enhanced magnetocaloric effect in frustrated magnets
• Magnetization plateaus in frustrated antiferromagnetic quantum spin models
• Enhanced magnetocaloric effect in frustrated magnetic molecules with icosahedral symmetry
• Geometric frustration in the class of exactly solvable Ising-Heisenberg diamond chains
• Magnetic phase diagram of the S=1/2 antiferromagnetic zigzag spin chain in the strongly frustrated region: cusp and plateau
• Frustrated three-leg spin tubes: from spin 1/2 with chirality to spin 3/2
• Exactly solvable mixed-spin Ising-Heisenberg diamond chain with the biquadratic interactions and single-ion anisotropy
• Vigorous thermal excitations in a double-tetrahedral chain of localized Ising spins and mobile electrons mimic a temperature-driven first-order phase transition
• Dysprosium-based experimental representatives of an Ising-Heisenberg chain and a decorated Ising ring
• Exactly solvable Ising--Heisenberg chain with triangular XXZ-Heisenberg plaquettes
• Magnetization plateaus of an exactly solvable spin-1 Ising-Heisenberg diamond chain
• Entanglement, magnetic and quadrupole moments properties of the mixed spin Ising-Heisenberg diamond chain
• Fractional magnetization plateaux of the spin-1/2 Heisenberg orthogonal-dimer chain revisited: strong-coupling approach developed from the exactly solved Ising-Heisenberg model
• Ground-state and magnetocaloric properties of a coupled spin-electron double-tetrahedral chain (exact study at the half filling)
• Bosonization and density-matrix renormalization group studies of Fulde-Ferrell-Larkin-Ovchinnikov phase and irrational magnetization plateaus in coupled chains
• Comparison between disordered quantum spin 1/2 chains
• Ground state, magnetization process and magnetocaloric effect of the exactly tractable spin-electron tetrahedral chain
• Doping-dependent magnetization plateaus of a coupled spin-electron chain: exact results
• Magnetic phase diagram of a frustrated ferrimagnetic ladder: Relation to the one-dimensional boson Hubbard model

Cited by in corpus (4)

• Peculiarities in pseudo-transitions of a mixed spin-$(1/2,1)$ Ising-Heisenberg double-tetrahedral chain in an external magnetic field
• Unconventional low temperature features in the one-dimensional frustrated $q$-state Potts model
• Finite size effects around pseudo-transition in one-dimensional models with nearest neighbor interaction
• Insights into Magnetic Properties of a Mixed Spin-Electron Model on Decorated Planar Lattices Composed of Half-filled Trigonal Bipyramids