Mobility theory of intermediate-bandwidth carriers in organic crystals: Scattering by acoustic and optical phonons

نویسندگان

  • L. Giuggioli
  • John D. Andersen
  • V. M. Kenkre
چکیده

An intermediate-bandwidth theory of charge-carrier mobility is developed with a focus on finite-band effects and scattering by phonons. Wide-band behavior is recovered as a limit. Two applications of the finite-band theory are discussed: in one a dip is predicted in the temperature dependence of the mobility, and in the other recently reported observations on ultrapure organic crystals are addressed.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Finite-Bandwidth Calculations for Charge Carrier Mobility in Organic Crystals

Finite-bandwidth effects on the temperature dependence of the mobility of injected carriers in pure organic crystals are explored for a simplifed case of impurity scattering. Temperature-dependent bandwidth effects are discussed briefly through a simplified combination of band and polaronic concepts.

متن کامل

Calculation of phononic and thermal properties of the CaB2 using the perturbation density functional theory (Research Article)

In this paper, the phononic structure and Enthalpy of CaB2 compound in simple hexagonal and orthorhombic phase have been investigated. The calculations were performed using the pseudo-potential method in the framework of the density functional theory and using the Quantum-Espresso code. Using the group theory and the characteristic table of the composition point group, the phonon modes were ide...

متن کامل

Phonon populations and electrical power dissipation in carbon nanotube transistors.

Carbon nanotubes and graphene are candidate materials for nanoscale electronic devices. Both materials show weak acoustic phonon scattering and long mean free paths for low-energy charge carriers. However, high-energy carriers couple strongly to optical phonons, which leads to current saturation and the generation of hot phonons. A non-equilibrium phonon distribution has been invoked to explain...

متن کامل

Anisotropy of the Electron and Hole Drift Mobility in KNbO3 and BaTiO3

We determine the anisotropy of the mobility of photoexcited charge carriers in single crystals of KNbO3 and BaTiO3 by means of a purely optical method. In orthorhombic KNbO3 the mobility anisotropy is measured for both electrons and holes giving ma mc 1.05 6 0.06, mb mc 2.9 6 0.3 for holes and ma mc 1.15 6 0.09, mb mc 1.9 6 0.2 for electrons. In BaTiO3 we find for holes ma mc 19.6 6 0.6. Our ex...

متن کامل

Size-quantized oscillations of the electron mobility limited by the optical and confined acoustic phonons in the nanoscale heterostructures

The authors theoretically investigated the electron mobility in the nanometer thickness AlN/GaN/AlN heterostructures limited by the polar optical and confined acoustic phonons. The proposed model accurately takes into account dispersion of the optical and acoustic phonons in such heterostructures as well as inelasticity of the electron scattering on both optical and acoustic phonons. It has bee...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003