Abstract
One of the fundamental models in strongly correlated system theories is tJ model defined by the Hamiltonian
Here \( \tilde c_{i\sigma }^\dag (\tilde c_{i\sigma } ) \) are creation (annihilation) operators for correlated electrons on site i. Correlated electrons means that a particle can be created on site i only if there is no already another electron on this site. This requirement is satisfied in definition of \( \tilde c_{i\sigma }^\dag \) and \( \tilde c_{i\sigma } \) operator via standard Fermi operators \( \hat c_{i\sigma }^\dag \) and \( \hat c_{i\sigma } \):
where \( \hat n_{i\sigma } = \hat c_{i\sigma }^\dag \hat c_{i\sigma } \)
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© 2010 Springer-Verlag Berlin Heidelberg
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Anisimov, V., Izyumov, Y. (2010). DMFT Extensions. In: Electronic Structure of Strongly Correlated Materials. Springer Series in Solid-State Sciences, vol 163. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-04826-5_4
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DOI: https://doi.org/10.1007/978-3-642-04826-5_4
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-04825-8
Online ISBN: 978-3-642-04826-5
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