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Pseudogap state of underdoped cuprate HTSC as a display of the Jahn-Teller pseudoeffect | | G.G. Sergeeva
; A.A. Soroka
; | | Date: |
7 Nov 2003 | | Subject: | Superconductivity | cond-mat.supr-con | | Abstract: | For underdoped cuprate HTSC within the framework of the two component model of charge carries (holes and Zhang-Rice polarons) it is considered two near degenerate states of hole molecular orbitals in copper-oxygen plane. These are the state of hole molecular orbitals around one-site Zhang-Rice polarons, and another state is two-site hole molecular orbitals around the two-site oxygen cluster of two nearest Jahn-Teller copper ions with antiferromagnetic ordering spins and with common oxygen ion. Taking into account that the vibronic mixing of these near-degenerate electronic states leads to the Jahn-Teller dynamic effect, in this paper the supposition that the pseudogap state is a consequence of the Jahn-Teller pseudoeffect is discussed. It is shown that existence of two-site Jahn-Teller polaron is consistent with a recent observation of broken time-reversal symmetry in the pseudogap state. | | Source: | arXiv, cond-mat/0311177 | | Services: | Forum | Review | PDF | Favorites | |
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