ZnO has become the focus of photonics and optoelectronic research. We prepared pure Mn(II) doped ZnO nanowires with a controlled reduction reaction by carbon in an asymmetrical tube. Careful time-resolved photoluminescence experimental study indicates three types of lasing mechanisms: exciton-exciton interaction, bipolaronic exciton condensation, and plasma; these exist in different ZnO nanowir...

2014 The problem of deformation induced attraction leading to localized pairs of electrons, the so-called bipolarons, is studied in detail. The analogy between bipolarons and itinerant Cooper pairs in a superconductor is explored. It is shown that the two types of pairing result from the microscopic nature of the electron-phonon Hamiltonian and that following the coupling constant the ground-st...

We explore the possibility that polaronic distortions in the paramagnetic phase of La 0.67 Ca 0.33 MnO 3 manganites persist in the ferromagnetic phase by considering the observed electrical resistivity to arise from the coexistence of field-and temperature-dependent polaronic and band-electron fractions conducting in parallel. To test the validity of this model, we apply it to the thermoelectri...

We have examined the binding energy of a polaron bound to a hydrogenic donor impurity located in a spherical quantum dot by means of a variational technique for both finite and infinite potential models. The polaronic effect on the binding energy has been considered taking into account the ion-phonon coupling by using the Lee-Low-Pines variational method. The results we have obtained show that ...

• Quantification of redox forms polyaniline. Octameric model for PANI transitions. Back to aniline-black structures. The transitions in acidic medium have been monitored by a combination cyclic voltammetry, situ conductance and FTIR spectroscopy. results the semiquantitative analysis strongly suggest that classical tetrameric does not satisfactorily describe actual structures polymer at differe...