Journal
PHYSICAL REVIEW B
Volume 90, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.045127
Keywords
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Funding
- Office of Basic Energy Sciences, U. S. Department of Energy [DE-FG-02-05ER46200, AC03-76SF00098, DE-FG02-07ER46352]
- NSF CAREER [DMR-1056625]
- National Science Council
- Academia Sinica, Taiwan
- Office of Science, Office of Basic Energy Sciences, of the U. S. Department of Energy [DE-AC02-05CH11231]
- U. S. Department of Energy [DE-AC02-76SF00515]
- University of Wisconsin-Madison
- A. P. Sloan Foundation
- [NSF-DMR-1006492]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1056625] Funding Source: National Science Foundation
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We use angle-resolved photoemission spectroscopy to show that the near-surface electronic structure of a bulk insulating iridate Sr3Ir2O7 lying near a metal-Mott insulator transition exhibits weak metallicity signified by finite electronic spectral weight at the Fermi level. The surface electrons exhibit a spin structure resulting from an interplay of spin-orbit, Coulomb interaction and surface quantum magnetism. Our results shed light on understanding the exotic quantum entanglement and transport phenomena in iridate-based oxide devices.
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