Superconductivity. Fermi arcs in a doped pseudospin-1/2 Heisenberg antiferromagnet

Y K Kim; O Krupin; J D Denlinger; A Bostwick; E Rotenberg; Q Zhao; J F Mitchell; J W Allen; B J Kim

doi:10.1126/science.1251151

Superconductivity. Fermi arcs in a doped pseudospin-1/2 Heisenberg antiferromagnet

Science. 2014 Jul 11;345(6193):187-90. doi: 10.1126/science.1251151. Epub 2014 Jun 12.

Authors

Y K Kim¹, O Krupin¹, J D Denlinger¹, A Bostwick¹, E Rotenberg¹, Q Zhao², J F Mitchell², J W Allen³, B J Kim⁴

Affiliations

¹ Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
² Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
³ Randall Laboratory of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
⁴ Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA. Randall Laboratory of Physics, University of Michigan, Ann Arbor, MI 48109, USA. Max Planck Institute for Solid State Research, Heisenbergstraße 1, D-70569 Stuttgart, Germany. bjkim@fkf.mpg.de.

PMID: 24925913
DOI: 10.1126/science.1251151

Abstract

High-temperature superconductivity in cuprates arises from an electronic state that remains poorly understood. We report the observation of a related electronic state in a noncuprate material, strontium iridate (Sr2IrO4), in which the distinct cuprate fermiology is largely reproduced. Upon surface electron doping through in situ deposition of alkali-metal atoms, angle-resolved photoemission spectra of Sr2IrO4 display disconnected segments of zero-energy states, known as Fermi arcs, and a gap as large as 80 millielectron volts. Its evolution toward a normal metal phase with a closed Fermi surface as a function of doping and temperature parallels that in the cuprates. Our result suggests that Sr2IrO4 is a useful model system for comparison to the cuprates.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.