Exact many-electron ground states on the diamond Hubbard chain.
نویسندگان
چکیده
Exact ground states of interacting electrons on the diamond Hubbard chain in a magnetic field are constructed which exhibit a wide range of properties such as flat-band ferromagnetism and correlation-induced metallic, half-metallic, or insulating behavior. The properties of these ground states can be tuned by changing the magnetic flux, local potentials, or electron density.
منابع مشابه
Exact many-electron ground states on diamond and triangle Hubbard chains
We construct exact ground states of interacting electrons on triangle and diamond Hubbard chains. The construction requires (i) a rewriting of the Hamiltonian into positive semidefinite form, (ii) the construction of a many-electron ground state of this Hamiltonian, and (iii) the proof of the uniqueness of the ground state. This approach works in any dimension, requires no integrability of the ...
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عنوان ژورنال:
- Physical review letters
دوره 99 2 شماره
صفحات -
تاریخ انتشار 2007