Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-03-15
J. Phys. Soc. Jpn. 73 (2004) 2219
Physics
Condensed Matter
Strongly Correlated Electrons
14 pages, 28 figures To be published in JPSJ
Scientific paper
10.1143/JPSJ.73.2219
In order to explain how impurities affect the unconventional superconductivity, we study non-magnetic impurity effect on the transition temperature using on-site U Hubbard model within a fluctuation exchange (FLEX) approximation. We find that in appearance, the reduction of Tc roughly coincides with the well-known Abrikosov-Gor'kov formula. This coincidence results from the cancellation between two effects; one is the reduction of attractive force due to randomness, and another is the reduction of the damping rate of quasi-particle arising from electron interaction. As another problem, we also study impurity effect on underdoped cuprate as the system showing pseudogap phenomena. To the aim, we adopt the pairing scenario for the pseudogap and discuss how pseudogap phenomena affect the reduction of Tc by impurities. We find that 'pseudogap breaking' by impurities plays the essential role in underdoped cuprate and suppresses the Tc reduction due to the superconducting (SC) fluctuation.
Kudo Kiwamu
Yamada Kosaku
No associations
LandOfFree
Reduction of Tc due to Impurities in Cuprate Superconductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Reduction of Tc due to Impurities in Cuprate Superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduction of Tc due to Impurities in Cuprate Superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-701405