Journal
PHYSICAL REVIEW B
Volume 87, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.245109
Keywords
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Funding
- National Science Foundation [DMR-1007014, DMR-0856234, EPS-0814194]
- US Department of Energy
- University of Wisconsin-Madison
- University of Wisconsin-Milwaukee
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1007014] Funding Source: National Science Foundation
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We studied Sr2IrO4 and Sr3Ir2O7 using angle-resolved photoemission spectroscopy, making direct experimental determinations of intra- and intercell coupling parameters as well as Mott correlations and gap sizes. The results are generally consistent with LDA + U + spin-orbit coupling calculations, though the calculations missed the momentum positions of the dominant electronic states and neglected the importance of intercell coupling on the size of the Mott gap. The calculations also ignore the correlation-induced spectral peak widths, which are critical for making a connection to activation energies determined from transport experiments. The data indicate a dimensionality-controlled Mott transition in these 5d transition-metal oxides.
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