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Solid State Physics
Posted on: 2018-10-17 00:32:35

The research in this branch is carried out in the following fields:

1. Magnetism, Ferroelectrics, Superconductors, Semiconductors and Multiferroics

Prof. Dr. Md. Feroz Alam Khan, Prof. Dr. A. K. M. Akther Hossain, Dr. Muhammad Samir Ullah, Dr. Mohammad Khurshed Alam and Dr. Md. Azizar Rahman are working in this group. Magnetic, ferroelectric and muliferroic materials are grown in the form of nanocrystalline, polycrystalline and thin films, and thoroughly investigated their various properties. This group has well equipped experimental setup to characterize the ac magnetic properties (initial permeability, magnetic loss factor as function of frequency up to 120 MHz and temperature), transport properties (impedance as function of frequency up to 120MHz and temperature, dielectric constants, and dielectric loss factor) and magnetoelectric voltage coefficient. This group is also preparing manganite materials using solid state reaction technique and investigating their magnetoresistance and magnetocaloric effect.

This group also studies the properties of high Tc, low Tc, and unconventional chiral nanocentrosymetric superconductors. The physical properties of low Tc and unconventional superconductors are computed and investigated by ab-initio density functional theory (DFT).

This group is also working on oxide semiconductors, diluted magnetic semiconductors (DMS), metallic alloys and metal halides. Vertically aligned semiconducting/metallic nanowires/nanorods are grown using vapour phase transport method. The structural, transport properties, and luminescence as a function of photon energy and temperature of these materials are studied. This group has further intension to control the dimension of nanowire/nanorod, and optimize their properties for designing optoelectronic devices (LED and LASER). This group has active collaboration with Osaka University, Japan and University of Technology Sydney, Australia.

2. Polymer Physics

Prof. Dr. Md. Forhad Mina, Dr. Mohammad Jellur Rahman, Dr. Parvin Sultana and Md. Mehdi Masud are working with soft condensed matters, especially with polymeric materials. Currently this group is preparing polymer thin films by plasma polymerization technique and characterizing them by various methods. Besides, this group is processing and developing noble polymer materials such as polymer blends and composites by extrusion molding, injection molding, hot pressing, etc. methods. The structural, electrical, mechanical, micromechanical, thermal, surface morphological etc. properties of these materials are characterized by various techniques and are correlated. These research studies are undertaken considering the potential applications of the newly emerging properties of the polymer blends and composites. This group has further intention to develop methods for polymer crystallization. They are also studying barium titanate based ceramic materials and chemical bath deposited semiconducting thin films, and characterizing them for optoelectronics applications. In addition, they are also working on synthesis and functionalization of carbon nanotubes and other nanoparticles, which are being incorporated into different synthetic and natural polymers to obtain technologically important nanocomposites. This group is also working on computational condensed matter physics (DFT, RPA and BerkeleyGW) so that the computational results can be connected with the experimental results.

3. Crystal Growth and Thin Film

Prof. Jiban Podder, Dr. Md. Mostak Hossain and Dr. Muhammad Samir Ullah work in this area. This group is engaged in studying the growth kinetics and habit modification of some technologically important non linear optical crystals from low temperature solutions growth technique. Structural, optical, electrical and meachanical properties of these grown crystals are studied. Prof. Jiban Podder also works on carbonization and graphitization of coal and organic compounds.

Prof. Jiban Podder and Dr. Muhammad Rakibul Islam are now working with thin film. This group is preparing semiconductor thin films by spray pyrolisis deposition (SPD) technique with an aim of finding suitable applications in solar cell and The structural, optical, electrical, mechanical, thermal, and surface morphological, etc. Properties of as deposited films are characterized by various techniques.

4. Nanotechnology

Nanotechnology, in general, refers to the arena of research dealing with matter at dimensions of roughly 1 to 100 nanometers, where unique phenomena enable novel applications. Encompassing nanoscale science, engineering and technology, nanotechnology involves synthesis, modeling, characterization, and manipulating properties of matter at this nanoscale. Although the exploration of novel nano-materials for various applications sounds exciting, state-of-the art research demands a dedicated nanotech research laboratory with modern experimental and analytical facilities. Keeping this in mind and also to keep pace with modern trend in research in related fields, Prof. Dr. Mohammed Abdul Basith is gradually building up a Nanotechnology Research Laboratory (NRL) at the Department of Physics, BUET. Since its inception in April 2014, different infrastructural facilities have been provided by BUET authority. The task of developing various synthesis and characterization facilities in such a short time-span is quite daunting, however, this has been established through research grants for our various projects worth of about 500 thousand USD from home and abroad. Currently, Dr. Basith is working on various research projects such as (i) Solar hydrogen production via water splitting using locally fabricated novel photcatalysts. (ii) Synthesis of rGO and MoS2 based nancomposites and investigation of their photocatalytic and electrochemical properties for energy applications. (iii) Structural, dielectric, ferroelectric and magnetic properties of multiferroic nanomaterials.  (iv) Synthesis of inorganic as well as metal halide perovskites by rapid hot-injection technique and investigation of their multiferroic and photocatalytic properties. (v) DFT based simulations with Hubbard U corrections on the structural, optical, electronic and magnetic properties of perovskite materials.