Optically Induced Symmetry Breaking Due to Nonequilibrium Steady State Formation in Charge Density Wave Material 1T-TiSe.

The strongly correlated charge density wave (CDW) phase of 1T-TiSe is of interest to verify the claims of a chiral order parameter. Characterization of the symmetries of 1T-TiSe is critical to understand the origin of its intriguing properties. Here we use very low-power, continuous wave laser excitation to probe the symmetries of 1T-TiSe by using the circular photogalvanic effect.

X-ray photoemission and absorption study of the pyrochlore iridates (Eu1-xBi)IrO, 0 ⩽ ⩽ 1.

The pyrochlore iridates (Eu1-xBi)IrO(0⩽⩽1) undergo an anomalous negative lattice expansion for small Bi-doping (x⩽0.035) (region I) and a normal lattice expansion forx⩾0.1(region II); this is accompanied by a transition from an insulating (and magnetically ordered) to a metallic (and with no magnetic ordering) ground state.