Abstract
We report angle resolved photoemission experiments on the electron doped Heisenberg antiferromagnet . For a doping level of , we find an unusual metallic state with coherent nodal excitations and an antinodal pseudogap bearing strong similarities with underdoped cuprates. This state emerges from a rapid collapse of the Mott gap with doping resulting in a large underlying Fermi surface that is backfolded by a reciprocal lattice vector which we attribute to the intrinsic structural distortion of .
- Received 22 July 2015
DOI:https://doi.org/10.1103/PhysRevLett.115.176402
© 2015 American Physical Society