Fermi-surface reconstruction and complex phase equilibria in CaFe2As2.

  title={Fermi-surface reconstruction and complex phase equilibria in CaFe2As2.},
  author={K Gofryk and Bayrammurad Saparov and Tomasz Durakiewicz and Alla Chikina and Steffen Danzenb{\"a}cher and Denis V Vyalikh and Matthias J. Graf and A S Sefat},
  journal={Physical review letters},
  volume={112 18},
Fermi-surface topology governs the relationship between magnetism and superconductivity in iron-based materials. Using low-temperature transport, angle-resolved photoemission, and x-ray diffraction, we show unambiguous evidence of large Fermi-surface reconstruction in CaFe2As2 at magnetic spin-density-wave and nonmagnetic collapsed-tetragonal (cT) transitions. For the cT transition, the change in the Fermi-surface topology has a different character with no contribution from the hole part of the… CONTINUE READING