| Spintronics Our group is working on electronic charge and spin transport studies in magnetic tunnel junctions, metal-semiconductor hetero-structures. We are investigating various newly discovered 2d materials, transition metal dichalcogenides for nanoelectronics and spintronics applications. Selected Publications - Electrical creation of spin polarization in silicon at room temperature, Saroj P. Dash, Sandeep Sharma, Ram S. Patel, Michel P. de Jong, and Ron Jansen, Nature 462, 491 (2009)
- Tunnel magnetoresistance with atomically thin two-dimensional hexagonal boron nitride barriers, Andre Dankert, M. Venkata Kamalakar, Abdul Wajid, R.S.Patel, and Saroj P. Dash, Nanoresearch (Springer), 8, 1357 (2015)
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Teny Theresa John | Dilute Magnetic Semiconductors Research work(in brief): We are working on broadly two areas: One is transition metal doped wide band gap oxide semiconductors (diluted magnetic semiconductors, DMS) and their applications and the other is semiconducting thin films for photovoltaic applications. We synthesize magnetic semiconducting nanoparticles using a simple chemical precipitation technique. The thin films are deposited by DC sputtering and thermal evaporation. The properties in both cases are investigated by various techniques like XRD,UV - Visible absorption, conductivity measurements, XPS, Raman, Photoluminescence, ESR, EXAFS, VSM, SQUID measurements etc. The possible applications of these samples are also explored.
Selected Publications On the visible luminescence in ZnO nanoparticles, Chithira P R and TenyTheresa John, J. Lumin. 185 (2017) 212-218 Defect and dopant induced room temperature ferromagnetism in Ni doped ZnO nanoparticles, Chithira P R and Teny Theresa John, Journal of Alloys and Compounds 766 (2018) 572 – 58 Correlation among oxygen vacancy and doping concentration in controlling the properties of cobalt doped ZnO nanoparticles, Chithira P R and Teny Theresa John, Journal of Magnetism and Magnetic Materials 496 (2020) 165928 |
E.S. Kannan | Nano-materials Currently our group is working on synthesis and characterization of metal oxide and transition metal dichalcogendies (TMDC) nanostructures. We synthesize metal oxide nanorods using template assisted electrodeposition and hydrothermal technique. The as synthesized nanorods are then investigated for their transport and gas sensing properties. In the case of TMDCs, we mechanically exfoliate materials such as MoS2, MoSe2, WS2 and WSe2 onto glass, ITO and Silicon substrate and study their field effect, photovoltaic and transport properties. Selected publications 1. Anomalous conductance induced by hydrogen in ZnO and catalyzed ZnO nanoflowers, R. Anu Roshini, K. Nagpal and E. S. Kannan, Euro. Phys. Lett. 127 57005 (2019). 2. Physical effects of passivation and creation of sulphur vacancy in MoS2 nanoparticles, R. Anu Roshini and E. S. Kannan, Mater. Res. Express 6 115045 (2019) |
Toby Joseph | Statistical mechanics, Interdisciplinary Physics and Physics Pedagogy
One of my current interests is in computational neuroscience where I am trying to understand auditory neuron tuning curves using simple integrate and fire models. I am also studying the depinning phenomenon, particularly the depinning of the 2D partially pinned solid (formed in the presence of a square substrate) and the associated phenomenon of peak effect. I am also interested in physics pedagogy. Some of my recent works involves mechanics of a particle on a rotating table in the presence of friction and an alternative geometric proof for the Euler's rotation theorem. |
Swastibrata Bhattacharyya | Condensed Matter Physics (Theory) I work in the area of theoretical and computational condensed matter physics which involves research in the interdisciplinary field of materials science, physics and chemistry. The goal of my research group is to design and search new materials for various applications such as energy storage, electrode for metal-ion batteries and straintronics; studying the origin of various physical phenomenon in materials; modification of materials properties; evolution of microstructures; defects, interfaces and doping of bulk and nano materials. We use first principles based density functional theory (DFT) for our research. Various well established codes are available for this purpose. Our expertise also extends to beyond DFT methodologies for band gap correction, phonon dispersion and transport properties. Code development is another research area of my interest, being one of the members to develop a new theoretical method (first principles based phase field method) to simulate evolution of microstructures in an alloy without any thermodynamic parameter. The research group is equipped with a high performance computing cluster and scientific packages for DFT calculation.
Selected publications 1. Swastibrata Bhattacharyya, Ryoji Sahara, Kaoru Ohno, "A first-principles phase field method for quantitatively predicting multi-composition phase separation without thermodynamic empirical parameter", Nature Communications, 10, 3451, page 1-10 (2019), Nature Publishing Group. 2. Swastibrata Bhattacharyya and Abhishek K. Singh, “Lifshitz transition and modulation of electronic and transport properties of bilayer graphene by sliding and applied normal compressive strain”, Carbon, 99, 432 (2016), Elsevier. 3. Avinash P. Nayak*, Swastibrata Bhattacharyya*, Jie Zhu, Jin Liu, Xiang Wu, Tribhuwan Pandey, Abhishek K. Singh, Deji Akinwande and Jung-Fu Lin, “Pressure-induced semiconducting to metallic transition in multilayered molybdenum disulfide”, Nature Communications, 5, 3731 (2014), Nature Publishing Group (* Equal contribution) |
Indrani Chakraborty 
| Condensed Matter Physics (Experiment) My current area of research is experimental soft matter physics and programmable self-assembly. I am interested in making flexible micro-objects using colloidal particles as building blocks, and stitching them together with a host of specific, programmable interactions ranging from DNA nanotechnology to magnetic interactions to chemical interactions between patchy particles. I am also interested in understanding the physics of anomalous diffusion in crowded systems that mimic biological environments. Here we use colloidal particles as probes. Additionally, I am interested in understanding and measuring the weak biological interactions (protein-protein, peptide-peptide) that are behind several vital processes in our bodies. Finally, we aim to self-assemble biomimetic nanomaterials for a wide range of applications such as developing superhydrophobic materials and efficient electron and X-ray emitters. Our area of work is interdisciplinary, encompassing expertise across the fields of physics, chemistry and biology. Selected publications 1. “Disorder-induced Fickian, yet non-Gaussian diffusion in heterogeneous media”, I. Chakraborty and Y. Roichman, Physical Review Research 2, 022020 (R) (2020). 2. “Nanoparticle mobility over a surface as a probe for weak transient disordered peptide-peptide interactions”, I. Chakraborty, G. Rahamim, R. Avinery, R. Back and Y. Roichman, Nano Letters 19, 6524 (2019). 3. “Colloidal joints with Designed motion range and tunable joint flexibility”, I. Chakraborty, C. van der Wel, V. Meester and D. J. Kraft, Nanoscale 9, 7814 (2017). 4. “Clustered copper nanorod arrays: A new class of adhesive hydrophobic materials”, I. Chakraborty, N. Singh, S. Gohil, S. Ghosh and P. Ayyub, Soft Matter 9, 11513 (2013). 5. “Field emission from hydrogen titanate nanotubes”, I. Chakraborty, S. Chatterjee and P. Ayyub, Appl. Phys. Lett. 99, 143106 (2011). 6. “Highly enhanced hard X-ray emission from oriented metal nanorod arrays excited by intense femtosecond laser pulses”, S. Mondal, I. Chakraborty, S. Ahmad, D. Carvalho, P. Singh, A. D. Lad, V. Narayanan, P. Ayyub and G. R. Kumar, Physical Review B 83, 035408 (2011). |
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PhD students
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Chithira P R
Ph.D. scholar I am working in
experimental condensed matter physics. Our broad area of research
includes studies on wide bandgap oxide based Diluted Magnetic
Semiconductors (DMS) mainly transition metals doped ZnO, TiO2 and SnO2
nanoparticles for optoelectronics and spintronics applications.. Ph.D. supervisor: Dr. Teny Theresa John | Sharvari KulkarniPh.D. scholar I am working in Experimental Condensed Matter Physics (Spintronics)
Ph.D. supervisor: Dr. Ram Shankar Patel
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Anu Roshini R
Ph.D. scholar I am working in Experimental Condensed Matter Physics
Ph.D. supervisor: Dr. E S Kannan | (PHOTO) Malavika C
Ph.D. scholar I am working in Experimental Condensed Matter Physics.
Ph.D. supervisor: Dr. E S Kannan
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KIRAN V Ph.D. scholar I am working in Condensed Matter Physics (Theory). I am interested in Non-equilibrium fluctuation theorems and its applications.
Ph.D. supervisor: Dr. Toby Joseph | Sumit Kumar Ph.D. scholar I am working in Experimental Condensed Matter Physics.
Ph.D. supervisor: Dr. Teny Theresa John
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