Nd, Ce(fπ)-O(pπ) HYBRIDIZATION IN Nd2−xCexCuO4 AND DYNAMIC JAHN-TELLER PAIRING IN HIGH-Tc SUPERCONDUCTORS
- 20 July 1989
- journal article
- research article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters B
- Vol. 03 (11) , 867-875
- https://doi.org/10.1142/s0217984989001369
Abstract
Hybridization of Nd (fπ) and Ce (fπ) orbitals with composite O (pπ)- O (pπ) bonding/ Cu(dπ*)-O(pπ) antibonding orbitals at the Fermi energy (EF) is shown to promote high-Tc superconductivity in Nd 2−x Ce x CuO 4. Dynamic Jahn-Teller coupling of these hybrid molecular orbitals to the lattice leads to Cooper pairing as it does in other high-Tc superconductors, such as La 2−x Sr x CuO 4, where O(pπ) character at E F is dominant.Keywords
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