We discuss the nature of polaron excitations in two models of current interest in the study of quasi-one-dimensional materials: the coupled electron-phonon and molecularcrystal models. Using for definiteness parameters appropriate to trans-(CH)„, we show that, although qualitatively very similar, the two polarons differ quantitatively in many respects. We then consider the very weakly bound pol...

The electronic properties of amorphous organic thin films are of great interest due to their application in devices such as light emitting devices, solar cells, photodetectors, and lasers. Compared to conventional inorganic semiconductors, amorphous organic thin films have the potential to enable entirely new functionality, larger areas, higher efficiencies, flexible substrates, and inexpensive...

The dynamics of pigment-pigment and pigment-protein interactions in light-harvesting complexes is studied with an approach that combines molecular dynamics simulations with quantum chemistry calculations and a polaron model analysis. The molecular dynamics simulation of light-harvesting (LH) complexes was performed on an 87 055 atom system comprised of a LH-II complex of Rhodospirillum molischi...

X-ray-absorption fine-structure measurements at the Mn K-edge as a function of temperature were performed on samples of La 1−x Ca x MnO 3 and La 0.67 Pb 0.33 MnO 3. All samples have a metal-insulator (MI) transition near the ferromagnetic transition, except the Ca 0.5 sample, which does not have a MI transition. Near T c for the MI samples, the Debye-Waller σ 2 for the Mn-O atom-pair increases ...

Electronic transport through rubrene single-crystal field-effect transistors (FETs) is investigated experimentally in the high carrier density regime (n ≃ 0.1 carrier molecule−1). In this regime, we find that the current does not increase linearly with the density of charge carriers, and tends to saturate. At the same time, the activation energy for transport unexpectedly increases with increas...

– The Coulomb correlation of a remote electron separated from a two-dimensional electron system (2DES) is studied in the presence of a magnetic field applied perpendicular to the 2DES. The polarization produced by the remote electron is described as the excitation of virtual plasmons in the 2DES. The resulting composite quasi-particle, electron + polarization, is therefore called a plasmon pola...

We consider a single impurity immersed in a Fermi sea close to an interspecies p-wave Feshbach resonance. We calculate its dispersion and spectral response to a radio frequency pulse. In a magnetic field, dipolar interactions split the resonance and two novel features with respect to the s-wave case appear: a third polaron branch in the excitation spectrum, in addition to the usual attractive a...

Photoinduced Charge Transfer and Polaron Dynamics in Polymer and Hybrid Photovoltaic Thin Films: Organic vs Inorganic Acceptors Kevin M. Noone, Selvam Subramaniyan, Qifeng Zhang, Guozhong Cao, Samson A. Jenekhe, and David S. Ginger* Department of Chemistry, Department of Chemical Engineering, and Department of Materials Science and Engineeering, University of Washington, Seattle, Washington 981...

This is a brief report of the author’s talk on some of bipolaron problems in the light of mathematical physics.