Ankur Pandya

Magnetotransport Study on Iron Doped Novel 2D Nanoribbons via Electron – Acoustical Phonon Interactions

The electron transport parameters such as electron energy relaxation rate and phonon limited electron resistivity for iron (transition metal) doped 2D nanoribbons of armchair graphene nanoribbon (a...

Electron - polar acoustical phonon interactions in nitride based diluted magnetic semiconductor quantum well via hot electron magnetotransport

In this paper the hot electron transport properties like carrier energy and momentum scattering rates and electron energy loss rates are calculated via interactions of electrons with polar acoustical phonons for Mn doped BN quantum well in BN nanosheets via piezoelectric scattering and deformation potential mechanisms at low temperatures with high electric field. Electron energy loss rate increases with the electric field. It is observed that at low temperatures and for low electric field the phonon absorption is taking place whereas, for sufficient large electric field, phonon emission takes place. Under the piezoelectric (polar acoustical phonon) scattering mechanism, the carrier scattering rate decreases with the reduction of electric field at low temperatures wherein, the scattering rate variation with electric field is limited by a specific temperature beyond which there is no any impact of electric field on such scattering.

Pressure dependent lattice specific heat and mode Grüneisen parameters for group III nitrides

The pressure dependent lattice specific heat and mode Gruneisen parameters for III–V nitrides have been calculated using a lattice dynamical model namely the rigid ion model which consists of a usual long range and short range potential. The Murnaghan’s equation of state is adopted for relating the volume dependence with pressure. The non linear least square fitting procedures to obtain the model parameters have been used. The results obtained using the present model calculation on mode Gruneisen parameters and specific are compared with existing experimental data and found in good agreement. There is a increase in in specific heat with pressure. The mode Gruneisen parameters show that the TA phonon mode is responsible for phase transition.