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            <title xml:lang="en">A simple model for the two-site Anderson Hamiltonian</title>
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            <idno type="halRefHtml">&lt;i&gt;Journal of Physics: Condensed Matter&lt;/i&gt;, 1994, 6 (38), pp.7773-7783. &lt;a target="_blank" href="https://dx.doi.org/10.1088/0953-8984/6/38/015"&gt;&amp;#x27E8;10.1088/0953-8984/6/38/015&amp;#x27E9;&lt;/a&gt;</idno>
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                <title xml:lang="en">A simple model for the two-site Anderson Hamiltonian</title>
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                <term xml:lang="en">Kondo effect</term>
                <term xml:lang="en">Magnetic susceptibility</term>
                <term xml:lang="en">RKKY interactions</term>
                <term xml:lang="en">Two site Anderson Hamiltonian</term>
                <term xml:lang="en">Crystal lattices</term>
                <term xml:lang="en">Hybridization</term>
                <term xml:lang="en">Diagonalization</term>
                <term xml:lang="en">Mathematical models</term>
                <term xml:lang="en">Magnetic properties</term>
                <term xml:lang="en">Electron energy levels</term>
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              <p>We consider a two-site Anderson Hamiltonian which includes hybridization both inside the same and between different sites, as well as Coulomb and exchange interactions between them. An exact diagonalization of this Hamiltonian is performed and the competition between the Kondo and RKKY interactions is studied as a function of the exchange, J, and the hybridization parameters. The local, uniform and staggered magnetic susceptibilities are calculated. From the correlation functions it is possible to see that the existence of the Kondo effect depends strongly on the ratio between the on-site and inter-site hybridizations. No divergence of the susceptibility was found at the critical J value for finite temperatures.</p>
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