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Infrared study of the electronic structure of the metallic pyrochlore iridate Bi2Ir2O7open access
- Authors
- Lee, Yun Sang; Moon, Soonjae; Riggs, Scott C.; Shapiro, Maxwell C.; Fisher, Ian R.; Fulfer, Bradford W.; Chan, Julia Y.; Kemper, Alexander F.; Basov, Dimitri N.
- Issue Date
- May-2013
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.87, no.19, pp.1 - 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 87
- Number
- 19
- Start Page
- 1
- End Page
- 7
- ISSN
- 2469-9950
- Abstract
- We investigated the electronic properties of a single crystal of metallic pyrochlore iridate Bi2Ir2O7 by means of infrared spectroscopy. Our optical conductivity data show the splitting of t(2g) bands into J(eff) ones due to strong spin-orbit coupling. We observed a sizable midinfrared absorption near 0.2 eV which can be attributed to the optical transition within the J(eff, 1/2) bands. More interestingly, we found an abrupt suppression of optical conductivity in the very far-infrared region. Our results suggest that the electronic structure of Bi2Ir2O7 is governed by the strong spin-orbit coupling and correlation effects, which are a prerequisite for theoretically proposed nontrivial topological phases in pyrochlore iridates.
- Appears in
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Related Researcher
- Moon, Soon jae
- COLLEGE OF NATURAL SCIENCES (DEPARTMENT OF PHYSICS)