Superconductivity

Pseudogap formation in copper oxide superconductors with inclusion of spin and charge fluctuations

V. V. Val'kov^ab, A. A. Golovnya^ab, M. M. Korovushkin<sup>ab

a</sup> L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk
^b M. F. Reshetnev Siberian State Aerospace University,

Abstract: The influence of spin and charge fluctuations on the pseudogap formation in cuprate superconductors has been studied using the diagram technique for Hubbard operators. It has been shown that the joint inclusion of the spin and charge fluctuations leads to the formation of “shadow” bands with a strong modulation of the spectral intensity and to a decrease in the density of electronic states at the Fermi level.

Received: 05.04.2011

 English version: Physics of the Solid State, 2011, 53:10, 2001–2004

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