- 作者: 丘應楠
- 作者服務機構: Center for Molecular Dynamics and Energy Transfer, Dept. of Chemistry, The Catholic Univ. of America, Washington, D.C., U.S.A.
- 中文摘要: Based on a chemist's understanding of electron transfer, attempts are made to interpret the physicists' BCS theory for low Tc superconductivity in terms of quantum chemical views. To show how to improve and apply some of the principles of the BCS theory for high Tc superconductors, especially those having to do with many-body aspects of correlation, coherence and long-range order, we (1) extend the two-partner, donor-acceptor electron transfer to large periodic systems with cyclic boundary conditions and with double-well potentials beyond Peierls distortion, (2) introduce second-order Jahn-Teller stabilization and introduce vibronic mixing as configuration interaction. To take advantage of existing bonds in high Tc superconductors we propose a linear combination of bonding(two-electron) geminals to form molecular bonding geminals which we call "Vibronic Geminals" after mixing with different running waves of bond structure vibrations. To take advantage of the valence bonds and double-well potentials due to anti-symmetric and other vibrations, we propose a 'Covalon' type model for the propagation and tunneling of such bonds which transform as Bosons.
- 英文摘要: --
- 中文關鍵字: Bcs Theory; Superconductivity; Charge Transfer; Double-Well Potential; Jahn-Teller Effect; Anti-Symmetry
- 英文關鍵字: BCS理論;超導體;電荷轉移;雙明確位能;賈思-特勒效應;反對稱