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

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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
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Issue Date
2014-07
Language
English
Article Type
Article
Keywords

SUPERCONDUCTORS; CA2-XNAXCUO2CL2; PSEUDOGAP; SR2IRO4; STATE; PHASE

Citation

SCIENCE, v.345, no.6193, pp.187 - 190

ISSN
0036-8075
DOI
10.1126/science.1251151
URI
http://hdl.handle.net/10203/212597
Appears in Collection
NT-Journal Papers(저널논문)
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