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In this paper we present a method for obtaining the quasiband structure and the renormalized density of quasistates of strongly correlated systems with antiferromagnetic ordering. We calculate the electronic structure of La 2 CuO 4 in order to test this method. The first step required is to calculate the electronic structure from the local density approximation (LDA) in order to obtain the initial non-interacting ground state. The LDA density of states in strongly correlated systems usually presents serious discrepancies with experimental results. As is well known, these discrepancies, fundamentally concerning photoemission, are due to the fact that the dynamic correlation effects are not taken into account within the LDA. In order to include these effects, we obtain a self-energy potential which allows the initial LDA electronic structure to connect with that of the antiferromagnetic ground state arising from a Bogolyubov-like transformation. Within this new ground state, we determine an antiferromagnetic self-energy by means of a spin density wave procedure, and the interacting Green function yields a density of states which is in reasonable agreement with the experimental photoemission result.

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LDA+? (?) Method for the Electronic Structure of Strongly Correlated Antiferromagnetic Materials: Application to La2CuO4

Pérez‐Navarro¹,

Costa‐Quintana

López‐Aguilar

2002

phys. stat. sol. (b)

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A study on structure and electrochemical properties of (La, Ce, Pr, Nd)2MgNi9 hydrogen storage electrode alloys

Zhang

Luo

Deng

et al. 2006

Electrochimica Acta

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New phase in Kondo lattices

Pérez‐Navarro

Costa‐Quintana

López‐Aguilar

1999

Physica B: Condensed Matter

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Interplay between dynamic screenedf-finteraction andsk⋅

Cited by 12 publications

References 38 publications

LDA+? (?) Method for the Electronic Structure of Strongly Correlated Antiferromagnetic Materials: Application to La2CuO4

LDA+? (?) Method for the Electronic Structure of Strongly Correlated Antiferromagnetic Materials: Application to La2CuO4

A study on structure and electrochemical properties of (La, Ce, Pr, Nd)2MgNi9 hydrogen storage electrode alloys

New phase in Kondo lattices

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