Angle dependent magnetoresistance measurements in Tl$_2$Ba$_2$CuO$_{6+Î´}$ and the need for anisotropic scattering

J. G. Analytis; M. Abdel-Jawad; L. Balicas; M. M. J. French; N. E. Hussey

doi:10.1103/PhysRevB.76.104523

paper

Angle dependent magnetoresistance measurements in Tl $_{2}$ Ba $_{2}$ CuO $_{6 + I^´}$ and the need for anisotropic scattering

arXiv:0708.1666 · doi:10.1103/PhysRevB.76.104523

Abstract

The angle-dependent interlayer magnetoresistance of overdoped Tl $_{2}$ Ba $_{2}$ CuO $_{6 + I^´}$ has been measured in high magnetic fields up to 45 Tesla. A conventional Boltzmann transport analysis with no basal-plane anisotropy in the cyclotron frequency $I ¨ _{c}$ or transport lifetime $I ¨ $ is shown to be inadequate for explaining the data. We describe in detail how the analysis can be modified to incorporate in-plane anisotropy in these two key quantities and extract the degree of anisotropy for each by assuming a simple four-fold symmetry. While anisotropy in $I ¨ _{c}$ and other Fermi surface parameters may improve the fit, we demonstrate that the most important anisotropy is that in the transport lifetime, thus confirming its role in the physics of overdoped superconducting cuprates.

14 pages, 13 Figures

Angle dependent magnetoresistance measurements in Tl2​Ba2​CuO6+I^´​ and the need for anisotropic scattering

Abstract

Angle dependent magnetoresistance measurements in Tl $_{2}$ Ba $_{2}$ CuO $_{6 + I^´}$ and the need for anisotropic scattering