Free energy of a d-wave superconductor in the nearly antiferromagnetic Fermi liquid model

Authors
Muhrer, G Schachinger, E
Citation
G. Muhrer et E. Schachinger, Free energy of a d-wave superconductor in the nearly antiferromagnetic Fermi liquid model, J L TEMP PH, 120(1-2), 2000, pp. 65-88
Citations number
31
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF LOW TEMPERATURE PHYSICS
ISSN journal
00222291 → ACNP
Volume
120
Issue
1-2
Year of publication
2000
Pages
65 - 88
Database
ISI
SICI code
0022-2291(200007)120:1-2<65:FEOADS>2.0.ZU;2-9
Abstract
A very general Hamiltonian which describes the coupling of charge carries v ia a spin susceptibility is used to derive a formula for the free energy di fference between the superconducting and the normal state of a d-wave super conductor. The formula is then specialized to the nearly antiferromagnetic Fermi liquid (NAFL) model and evaluated numerically. The comparison with sp ecific heat data measured for optimally doped YBa2Cu3O6.95 reveals the nece ssity to include even contributions far away from the Fermi surface in deri ving the free energy formula is proved to be inadequate.