2003/11/07 by G. G. Sergeeva, Sergeeva, G. G., A. A. Soroka +1
Engineering · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0311177
9 pages, 1 figure
arxiv created 2003/11/07 · openalex publication_date 2003/11/07 · arxiv updated 2009/12/01 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
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.