Hartee Fock Symmetry Breaking Effects in La2CuO4: Hints for connecting the Mott and Slater Pictures and Pseudogap PredictionReportar como inadecuado




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1

Departamento de Física, Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear CEADEN, Calle 30, esq. a 5ta, La Habana, Cuba

2

Grupo de Física Teórica, Instituto de Cibernética Matemática y Física ICIMAF, Calle E, No. 309, entre 13 y 15, Vedado, La Habana, Cuba





*

Author to whom correspondence should be addressed.



Abstract This work expands the results and derivations presented in a recent letter. It is argued that symmetry breaking Hartree-Fock HF solutions of a simple model of the Cu-O planes in La2CuO4, are able to describe the insulator and antiferromagnetic characters of this material. Then, this classical primer of a Mott insulator is alternatively obtained here as an exact Slater insulator within the simplest of the first principles schemes. Moreover, pseudogap HF states are also predicted. The maximal energy gap of 100 meV over the Fermi surface of this wavefunction, reasonably well matches the ARPES upper pseudogap measurements for La2CuO4 in the zero doping limit. These surprising results followed after eliminating spin and crystal symmetry constraints usually imposed on the HF orbitals. The discussion helps to clarify the role of the antiferromagnetism and pseudogaps in the physics of the HTSC materials and indicates a promising way to start conciliating the Mott and Slater pictures for the description of the transition metal oxides.

Keywords: symmetry breaking; strongly correlated electron systems; Magnetism; HTc supercondutivity; HTSC; pseudgaps; MIS; entanglement symmetry breaking; strongly correlated electron systems; Magnetism; HTc supercondutivity; HTSC; pseudgaps; MIS; entanglement





Autor: Alejandro Cabo-Bizet 1 and Alejandro Cabo Montes De Oca 2,*

Fuente: http://mdpi.com/



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