(VIRTUAL) The Electronic Band Structure of the Iridates
Comprehensive Exam
3:00 pm –
4:00 pm
Jorgensen Hall
Contact:
Physics Department, paoffice@unl.edu
Archit Dhingra will present his comprehensive exam, “The Electronic Band Structure of the Iridates”
Zoom Meeting: : https://unl.zoom.us/j/5206922519 (Meeting ID: 520 692 2519)
Abstract:
Electronic correlations, magnetism, and the readjustment of the octahedral rotation, depend on dimensionality and the combination of strong electron correlation and strong (relativistic) spin–orbit coupling, in the high–Z 5d TMOs. Combination of these factors has led to the prediction of various exotic quantum states, such as high Tc superconductors, topological insulators, correlated topological insulators, topological semimetals, Weyl semimetals with Fermi arcs, and axion insulators, to name a few. Surprisingly, a remarkable group of 5d TMOs known as the iridates (iridium oxides) share some commonalities in the band structure based on the results of various experimental measurements that were carried out using angle-resolved photoemission spectroscopy (ARPES), optical conductivity, x-ray absorption; and first-principles band structure calculations. A review of the experimental efforts has shown that several iridates exhibit a metal insulator transition that depends on dimensionality. There are other similarities among the iridates, for example, in the thin film limit, SrIrO3 resembles bulk Sr2IrO4. Here, an attempt has been made to compare the electronic structure of this group of iridates.
Zoom Meeting: : https://unl.zoom.us/j/5206922519 (Meeting ID: 520 692 2519)
Abstract:
Electronic correlations, magnetism, and the readjustment of the octahedral rotation, depend on dimensionality and the combination of strong electron correlation and strong (relativistic) spin–orbit coupling, in the high–Z 5d TMOs. Combination of these factors has led to the prediction of various exotic quantum states, such as high Tc superconductors, topological insulators, correlated topological insulators, topological semimetals, Weyl semimetals with Fermi arcs, and axion insulators, to name a few. Surprisingly, a remarkable group of 5d TMOs known as the iridates (iridium oxides) share some commonalities in the band structure based on the results of various experimental measurements that were carried out using angle-resolved photoemission spectroscopy (ARPES), optical conductivity, x-ray absorption; and first-principles band structure calculations. A review of the experimental efforts has shown that several iridates exhibit a metal insulator transition that depends on dimensionality. There are other similarities among the iridates, for example, in the thin film limit, SrIrO3 resembles bulk Sr2IrO4. Here, an attempt has been made to compare the electronic structure of this group of iridates.