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arXiv · 1406.4489

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
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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 non-cuprate material Sr2IrO4 in which the unique 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 meV. 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.

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Y. K. Kim, O. Krupin, J. D. Denlinger, A. Bostwick, E. Rotenberg, Q. Zhao, J. F. Mitchell, J. W. Allen, B. J. Kim. 2014-06-17. Fermi Arcs in a Doped Pseudospin-1/2 Heisenberg Antiferromagnet. https://doi.org/10.1126/science.1251151

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