Effect of Structural Defects and Impurities on the Excited State Dynamics of 2D BA₂PbI₄ Perovskite

In this work, we show that the quality of the precursor and the thin film preparation strongly affect the optoelectronic properties of the 2D perovskite BA₂PbI₄. 2D perovskites with alkylammonium organic cations such as butylammonium (BA) are relatively soft structures that exhibit large dynamic disorder and phase...

Positron depth profiling of the structural and electronic structure transformations of hydrogenated Mg-based thin films

We report positron depth-profiling studies on the hydrogen sorption behavior and phase evolution of Mg-based thin films. We show that the main changes in the depth profiles resulting from the hydrogenation to the respective metal hydrides are related to a clear broadening in the observed electron momentum densities in both Mg and Mg2Ni films....

Magnetic phase diagram and structural separation of La0.7(Ca1?ySry)0.3MnO3 thin films

The structural, magnetic, and transport properties of La0.7(Ca1?ySry)0.3MnO3 films, deposited on a LaAlO3?(001) single crystalline substrate by rf-magnetron sputtering using “soft” (or powder) targets, have been investigated. It was found that at 0.3 ? y ? 0.5 both the rhombohedral (R3c) and the orthorhombic (Pnma) crystal phases in the form of...

Photolithographic patterning of the charge-density-wave conductor Rb 0.30 MoO 3

Low-temperature current-voltage characteristics of YBa 2Cu 3O 7-delta films in a magnetic field: Direct evidence for a vortex-glass phase

Measurement of the exponent mu in the low-temperature phase of YBa 2Cu 3O 7-delta films in a magnetic field: Direct evidence for a vortex-glass phase