Dadachanji, Z., Godby, R.W., Needs, R.J. and Littlewood, P.B. (1995) Charge-transfer excitations in the cuprate superconductors. Physical Review B, 52 (22). pp. 16204-16207. ISSN 1098-0121Full text not available from this repository.
First-principles calculations of the dielectric matrix of the key structural element of the copper-oxide super-conductors show a weakly damped resonance at 3.5 eV which contains most of the oscillator strength in charge-transfer excitations. Such excitations have been proposed as a mediating boson for superconductive pairing. Although this mode is a well-developed and robust excitation, we find its energy to be too large to give high superconducting transition temperatures.
|Copyright, Publisher and Additional Information:||© 1995 American Physical Society.|
|Institution:||The University of York|
|Academic Units:||The University of York > Physics (York)|
|Depositing User:||Physics Import|
|Date Deposited:||25 Sep 2008 10:16|
|Last Modified:||25 Sep 2008 10:16|
|Publisher:||American Physical Society|