Projects

Research projects in 2D systems

Experimental: Transport in 2 dimensional disordered carbon films
The main objective of our project is to investigate the microscopic origin of quantum & high speed conductance at low temperatures and in the presence of high magnetic field within band modulated carbon Quantum Well (QW) structures. Studying nano-science in low-dimensional carbon (e.g. ballistic transport) and finding novel nano-electronic devices will be our goal.

Materials: Graphene, Carbon quantum wells, superlattices, heterojunctions, nanocrystalline diamond films, carbon and oxide materials superstructures

Multilayer CMR/GMR films

Theory Project: Transport in 2D disordered carbon quantum wells

(i) A Resonant tunneling through a tunnel barrier of weakly localized system.
(ii) A Exact calculation of NDR features in disordered carbon RTD (non-equilibrium Green?s function).
(iii) A The non-dispersive transport in carbon having a high coherence length and low scattering time in high frequency regime (conductance bias, frequency) A to explain the microwave switching behavior in carbon quantum wells. [For post-doctoral students]
(iv) A Inter-layer transport in a layered carbon structure A and angle-dependent magneto-resistance.Spin resonant tunnel devices of metal doped carbon and Three terminal tunnel devices:]

Research projects in 1D systems

Transport in 1D nanowires & nanotubes superlattice structures and filamentary channels
Experimental: A

Work under this project involves synthesis of aligned nanotubes and nanowires by employing pulsed (YAG) laser vaporization technique, characterization using nanoscopic-measurement tools and develop (opto-) electronics. Doped semiconductor nanowires of Si-Ge, SiC, BN and other nano-crystalline materials will be synthesized as a part of the program.

Objectives of this project are to investigate (i) growth mechanism of carbon nanotubes (ii) the microscopic origin of quantum confinement in semiconductor nanowires and also by applying high pressure (iii) spintronic device applications of metal filled nanotubes (iv)high speed electrical conductance in 1D materials.

Modeling:

Theoretical calculations and Modeling: To study resonant tunneling in 1D superlattice we shall calculate the negative differential resistance and tunnel current A through transmission coefficient of electrons (and spin calculation). Calculation of tunnel current and high frequency (GHz-THz) impedance in 1D wires tunnel junctions and superlattices having site disorder but high coherence length [tight binding approach].

(iii) Spintronics

(iv) Optoelectronics: Sensors