Confinement-Deconfinement Transition as an Indication of Spin-Liquid-Type Behavior in Na${}_2$IrO${}_3$

Zhanybek Alpichshev, Fahad Mahmood, Gang Cao +1

We use ultrafast optical spectroscopy to observe binding of charged single-particle excitations (SE) in the magnetically frustrated Mott insulator Na${}_2$IrO${}_3$. Above the antiferr…