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An exponential intersite-dependence of the transfer integral in the Hubbard Hamiltonian together with U ≥ 3t in a quarter filled band lead to a separation of the 2kF and 4kF components of the Peierls transition. A phase diagram of the transition temperatures versus U/t can be constructed. The results for some physical properties such as the spin susceptibility can be favorably compared with experiment

le journal de physique colloques

CALCULATIONS OF THE ELECTRONIC (4k<sub>F</sub>) AND MAGNETIC (2k<sub>F</sub>) PHASE TRANSITIONS FROM A HUBBARD HAMILTONIAN WITH AN EXPONENTIALLY DEPENDENT INTERSITE-TRANSFER INTEGRAL

CALCULATIONS OF THE ELECTRONIC (4kF) AND MAGNETIC (2kF) PHASE TRANSITIONS FROM A HUBBARD HAMILTONIAN WITH AN EXPONENTIALLY DEPENDENT INTERSITE-TRANSFER INTEGRAL

CALCULATIONS OF THE ELECTRONIC (4k_F) AND MAGNETIC (2k_F) PHASE TRANSITIONS FROM A HUBBARD HAMILTONIAN WITH AN EXPONENTIALLY DEPENDENT INTERSITE-TRANSFER INTEGRAL