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arXiv · cond-mat/0506354

Optical sum in Nearly Antiferromagnetic Fermi Liquid Model

E. Schachinger·J. P. Carbotte
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Abstract

We calculate the optical sum (OS) and the kinetic energy (KE) for a tight binding band in the Nearly Antiferromagnetic Fermi Liquid (NAFFL) model which has had some success in describing the electronic structure of the high $T_c$ cuprates. The interactions among electrons due to the exchange of spin fluctuations profoundly change the probability of occupation $(n_{{\bf k},σ})$ of states of momentum {\bf k} and spin $σ$ which is the central quantity in the calculations of OS and KE. Normal and superconducting states are considered as a function of temperature. Both integrals are found to depend importantly on interactions and an independent electron model is inadequate.

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E. Schachinger, J. P. Carbotte. 2005-06-15. Optical sum in Nearly Antiferromagnetic Fermi Liquid Model. https://doi.org/10.1103/physrevb.72.014535

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