An outstanding question regarding cuprate superconductors is how the Fermi liquid behaviour of their normal state breaks down. Chang et al. conduct a systematic ARPES study of how the Fermi liquid quasiparticle excitations break down in momentum space, and find it to be highly anisotropic in La2−xSrxCuO4.
- J. Chang
- M. Månsson
- J. Mesot