Reduced effect of impurities on the universal pairing scale in the cuprates Institutional Repository Document uri icon

abstract

  • We consider the effect of non-magnetic impurities on the onset temperature $T^*$ for the $d-$wave pairing in spin-fluctuation scenario for the cuprates. We analyze intermediate coupling regime when the magnetic correlation length $xi/a >1$ and the dimensionless coupling $u$ is O(1). In the clean limit, $T^* approx 0.02 v_f/a$ in this parameter range, and weakly depends on $xi$ and $u$. We found numerically that this universal pairing scale is also quite robust with respect to impurities: the scattering rate $Gamma_{cr}$ needed to bring $T^*$ down to zero is about 4 times larger than in weak coupling, in good quantitative agreement with experiments. We provide analytical reasoning for this result.

author list (cited authors)

  • Vorontsov, A. B., Abanov, A. r., Vavilov, M. G., & Chubukov, A. V.

citation count

  • 0

complete list of authors

  • Vorontsov, AB||Abanov, Ar||Vavilov, MG||Chubukov, AV

Book Title

  • arXiv

publication date

  • September 2009