PG Students interested to do their PG Projects in Ab-initio methods or Understanding various Physics experiments with a Computational Approach are encouraged to Apply to robycherian@shcollege.ac.in 

• Development of empirical pseudopotentials, Ab-initio electronic structure calculations, extraction of model Hamiltonian parameters from ab-initio approaches, understanding the physical properties of semiconductor nanocrystals using electronic structure calculations.
• An investigation of bulk modulus and cohesive energy of GaP in the local density approximation
  AIP Conference Proceedings 2265, 030347 (2020); https://doi.org/10.1063/5.0017216
  Kiran John U, Roby Cherian, Amegha Sahni, Mili S. Mohan, and Siby Mathew
• Large-scale atomic effective pseudopotential program including an efficient spin-orbit coupling treatment in real space F. Zirkelbach, P.-Y. Prodhomme, Peng Han, R. Cherian, and G. Bester Phys. Rev. B 91, 075119 – Published 20 February 2015
• Saikat Debnath, Roby Cherian, and Priya Mahadeva “The role of Passivants on the Stoichiometry of CdSe and GaAs Nanocrystals”, The Journal of Physical Chem. C October 2013.
• Roby Cherian, C. Gerard, P. Mahadevan, Nguyen Thanh 2010 Cuong, and Ryo Maezono “Size dependence of the bulk modulus of semiconductor nanocrystals from first principles calculations”, Phys. Rev. B. 82, 235321 (2010).
• A. Nag, Roby Cherian, P. Mahadevan, A. V. Gopal, A. Hazarika, A.Mohan, A. S. Vengurlekar, and D. D. Sarma, “Size-Dependent Tuning of Mn2+ d Emission in Mn2+-Doped CdS Nanocrystals: Bulk vs Surface”, J. Phys. Chem. C 114,18323 (2010).
• Roby Cherian, P. Mahadevan, and C. Persson, “Role of Coulomb interactions in semicore levels : Implication on band offsets”, Solid State Communications 149, 1810 (2009).
• Roby Cherian, P. Mahadevan, and C. Persson, “Trends in ferromagnetism in Mn-doped dilute III-V alloys from a density functional perspective”, Phys. Rev. B. 79, 195211 (2009).
• Roby Cherian, and P. Mahadevan, “Effects of non-stiochiometry on the lattice constant of semiconductor nanocrystals: CdSe and GaAs”, Accepted for publication in J. Nanoscience and Nanotechnology, 9, 5564 (2009).
• Roby Cherian, A. K. Nandy, and P. Mahadevan, “Can Nano Silicon be Made Optically Active?”, Accepted for publication in J. Nanoscience and Nanotechnology,9, 5561 (2009).
• Roby Cherian, A. Kumar, and P. Mahadevan, “Effects of quantum confinement on the conduction band minimum of semiconductors”, Accepted for publication in J. Nanoscience and Nanotechnology,9, 5673 (2009).
• Roby Cherian, and P. Mahadevan, “Size dependence of lattice constants of semiconductor nanocrystals”, Appl. Phys. Lett. 92, 043130 (2008). ​This article was selected for the February 18, 2008 issue of Virtual Journal of Nanoscale Science and Technology.
• Roby Cherian, and P. Mahadevan, “Bulk and nanoscale GaN: Role of Ga d states”, Phys. Rev. B. 76, 075205 (2007).
• Roby Cherian, and P. Mahadevan, “Elastic properties of Carbon Nanotubes: An atomistic approach”, J. Nanoscience and Nanotechnology, 7, 1779 (2007).
• SixC1− xO2 alloys: A possible route to stabilize carbon-based silica-like solids?, Solid state communications 144 (7-8), 273-276
• C Gérard, R Cherian, P Mahadevan, DD Sarma, “Are Carbon nanocrystals less compressible than their bulk counterparts?” – Conference: International Workshop on Computational Mechanics of Materials – 18
• JR Cardenas, R Cherian, G Bester “A new type of pseudopotentials: effective atomic pseudopotentials”, A new type of pseudopotentials: effective atomic pseudopotentials , APS 2012, B39 .015
• G Bester, R Cardenas, F Zirkelbach, PY Prodhomme, P Han, R Cherian ” Large-scale Atomic Effective Pseudopotential Method for the Electronic Structure of Semiconductor Nanostructures” Bulletin of the American Physical Society 58

M.Sc Projects:

• Nisha Davis, Meera Mathew and Roby Cherian, “Compressibility of GaAs- An Ab-initio study”, Heartian Journal of Pure and Applied Sciences Vol 03, No. 01 2014.
• Amegha Sahni, Mili S Mohan and Roby Cherian, “Higher Bulk modulus – GaP or GaAs?-An Ab-initio study”, Heartian Journal of Pure and Applied Sciences Vol 05, No. 01 2016.
• Kiran John U and Roby Cherian, “Cohesive Energy of GaP in the Local density approximation”, Heartian Journal of Pure and Applied Sciences Vol 05, No. 01 2016.

Conferences and Workshops

• Participated in National Webinar on “Virtual Labs for Experiential Learning in Science Domain” on 20th March 2021 – Organized by St. Xavier’s College Aluva and NIT Suratkal
• Participated in “Annual Physics Symposium APS 2020-21” –  18th and 19th Feb 2021 – Organized by St. Teresas College Ernakulam.
• Attended teachers training workshop on research based pedagogical tools (MHRD and IISER Pune) from Oct 11-14 2017.
• Attended Flair induction program by higher Education Govt. of Kerala in the academic year 2016-17.
• Attended the Refresher Course in Material Sciences for University/ College Teachers conducted from 29-11-2016 to 19-12-2016 organized by the UGC-Human Resource Development Centre University of Kerala, Kariavattom, Thiruvananthapuram
• Attended the Orientation Course for University/ College Teachers conducted from 20-11-2013 to 17-12-2013 organized by the UGC-ASC Kannur.
• Poster at National Review and Coordination Meeting 2009 on Nanoscience and Nanotechnology (NSNT) – 2009, Kolkata, India. 12-14 March, 2009.
• Poster at The Second International Conference on Frontiers in Nanoscience and Technology (Cochin Nano 2009), Department of Physics, Cochin University of Science and Technology, Cochin, Kerala, India. 03-06 Jan,2009.
• Poster at International Conference on Nanoscience and Nanotechnology (ICONSAT) -2008, Chennai, India. 27-29 Feb, 2008.
• Poster at National Review and Coordination Meeting on Nanoscience and Nanotechnology (NSNT) – 2007, Hyderabad, India. 21-23 Feb, 2007.

• Poster at International Conference on Lasers and Nanomaterials (ICLAN) -2006, Department of Physics, University of Calcutta, India. 30 Nov – 2 Dec, 2006.
• Poster at Bangalore Summer School on ”Electronic Structure Methods and their Applications” in conjunction with Conference on Computational Materials Theory, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India. 10 – 22 July, 2006.
• Poster at International Conference on Nanoscience and Nanotechnology (ICONSAT) – 2006, India Habitat Centre, New Delhi, India. 16-18 March, 2006.
• Roby Cherian, Do binary nanocrystals with only one type 2009 of atoms on the surface form?, at ”BOSEFEST”, S.N Bose National Centre for Basic Sciences, India. April 1-2, 2009.
• Roby Cherian, Semiconductor: Bulk and Nanoscale, at ”BOSEFEST”, S.N Bose National Centre for Basic Sciences, India. Jan 30-31, 2008.
• Roby Cherian, Mechanical Properties in Nanoregime, at the ”1-Day Symposium for the UNANST group”, S.N Bose National Centre for Basic Sciences, India. Nov.3, 2006.