Electron-phonon interactions in halide perovskites

Lead halide perovskites: Crystal-liquid duality, phonon glass electron crystals, and large polaron formation

Lead halide perovskites have been demonstrated as high performance materials in solar cells and light-emitting devices. These materials are characterized by coherent band transport expected from crystalline semiconductors, but dielectric responses and phonon dynamics typical of liquids. This "crystal-liquid" duality implies that lead halide perovskites belong to phonon glass electron crystals, ...

Acoustic-optical phonon up-conversion and hot-phonon bottleneck in lead-halide perovskites

The hot-phonon bottleneck effect in lead-halide perovskites (APbX3) prolongs the cooling period of hot charge carriers, an effect that could be used in the next-generation photovoltaics devices. Using ultrafast optical characterization and first-principle calculations, four kinds of lead-halide perovskites (A=FA+/MA+/Cs+, X=I-/Br-) are compared in this study to reveal the carrier-phonon dynamic...

Effective one–band electron–phonon Hamiltonian for nickel perovskites

Inspired by recent experiments on the Sr–doped nickelates, La2−xSrxNiO4, we propose a minimal microscopic model capable to describe the variety of the observed quasi–static charge/lattice modulations and the resulting magnetic and electronic–transport anomalies. Analyzing the motion of low–spin (s = 1/2) holes in a high–spin (S = 1) background as well as their their coupling to the in–plane oxy...

Electron-phonon interactions and superconductivity.

Electron-Phonon and Electron-Electron Interactions in Quantum Transport

The objective of this work is t o shed light on electron transport through sub-micron semiconductor structures, where electronic state quantization, electron-electron interactions and electron-phonon interactions are important. We concentrate here on the most developed vertical quantum device, the double barrier resonant tunneling diode. In this work we analyze particle interactions in two stru...