Excitation spectrum of one-dimensional extended ionic Hubbard model
نویسندگان
چکیده
منابع مشابه
Broken Symmetries in the One-Dimensional Extended Hubbard Model
The past two decades have witnessed the discoveries of several new classes of novel electronic materials. Ranging from conducting polymers through charge transfer solids and inorganic chain compounds to organic and high temperature superconductors, these materials have in common two important, unusual properties. First, their electronic structures are strongly anisotropic, in some cases (e.g., ...
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We use a density-matrix renormalization group method to study quantitatively the phase diagram of a one-dimensional extended Hubbard model at half filling by investigating the correlation functions and structure factors. We confirmed the existence of a novel narrow region with long-range bond-order-wave order that was highly controversial recently between the charge-density-wave phase and Mott ...
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We consider the one-dimensional Hubbard model at half filling. We show that both excitation spectrum and S-matrix are determined by the SO(4) symmetry of the model. The complete set of excitations is given by the scattering states four elementary excitations, which form the fundamental representation of SO(4). We evaluate the exact S-matrix, which satisfies the Yang-Baxter relation. The results...
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متن کاملComment on "Ground-state phase diagram of a half-filled one-dimensional extended Hubbard model".
The density-matrix renormalization group is used to study the phase diagram of the one-dimensional half-filled Hubbard model with on-site (U) and nearest-neighbor (V) repulsion and hopping t. A critical line V(c)(U) approximately U/2 separates a Mott insulating phase from a charge-density-wave phase. The formation of bound charge excitations for V>2t changes the phase transition from continuous...
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ژورنال
عنوان ژورنال: The European Physical Journal B
سال: 2010
ISSN: 1434-6028,1434-6036
DOI: 10.1140/epjb/e2010-10509-x