Speaker
Yunsang Lee
(UCSD/Soongsil University)
Description
Y. S. Lee1,2, S. J. Moon1, Scott C. Riggs3, M. C. Shapiro3, I. R. Fisher3, and D. N. Basov
1 University of California at San Diego, La Jolla, CA 92093
2 Soongsil University, Seoul 156-743, Korea
3 Stanford University, Stanford, CA 94305
We investigated the electronic structure of a metallic pyrochlore Bi2Ir2O7 by using infrared spectroscopy. Consistent with a metallic response in transport, the optical conductivity spectra of this compound exhibit a Drude component which is rather narrow. Two interband transitions are identified near 0.2 and 1.0 eV, which are assigned as the d-d transitions related to Jeff,1/2 and Jeff, 3/2 bands, respectively. The temperature dependence in optical spectra is found to be weak. The electronic structure of Bi2Ir2O7 is well-described with the significance of spin-orbit coupling in 5d oxides.
Primary author
Yunsang Lee
(UCSD/Soongsil University)
