Principal Investigator:                                                                                         

Our group El Nano

• What happens to magnetism if you thin your magnet down to few atomic layer?  "At any non-zero temperature, a one- or two-dimensional isotropic spin-S Heisenberg model with finite-range exchange interaction can be neither ferromagnetic nor antiferromagnetic."- Phys. Rev. Lett.  (1966) by N. D. Mermin and H. Wagner.  But what happens when we have "anisotropy" in the system -->Two-dimensional (2D) Magnetism - atomic layer magnetic materials (Ferro/antiferro)
• And what happens when you stack your "thin" magnet on another  "exotic"  order! - Heterostructure with magnet and topological insulator - magnetic topological insulator
• Can we control/manipulate elementary excitations (magnon/s) in magnets via electric/magnetic field?
• Nanospintronics - Spin transport in quantum dots and 2D materials
• Hybrid 2D materials (Graphene, 2D TMDCs, etc.)

• Sample growth - Chemical Vapor Transport, Solid State Reaction
• Fabrication of devices: Lithography (e-beam, optical), Thermal evaporation, Sputtering
• Characterization:

• Chemical Vapor Transport for sample growth [SERB]
• Thermal Evaporator
• Wire bonder [Seed grant]
• Low-temperature cryostat (10 K - 300 K) [SERB]
• Probe station and accessories for electrical transport measurement [SERB]

Central Facility, IACS:

• Raman spectroscopy -  temperature dependent
• e-beam lithography
• SQUID, PPMS, Dielectric Measurement
• Atomic Force Microscopy
• Laser Scanning Confocal Microscope

Ms. Anudeepa Ghosh (SRF, Institute Fellow) - working on layered antiferromagnets  [e-mail: anudeepa.ghosh@gmail.com], BSc - CU, MSc - BHU. Selected Publication/s: Phys. Rev. B 103, 064431 (2021)

Mr. Sujan Maity (SRF, INSPIRE) - working on magnetic vdW heterostructures [e-mail: sujanmaity1994@gmail.com], BSc - WBSU, MSc - IIT Guwahati.

Mr. Bikash Das (Int. PhD) - working on layered ferromagnets and local electronic transport properties. [e-mail: bikashcgr1@gmail.com], BSc - Burdwan University, MSc - IACS

Mr. Rahul Paramanik (JRF), BSc - Burdwan University, MSc - ISM Dhanbad

Dr. Mainak Palit (RA1) - Raman Spectroscopy and device physics. [e-mail: mainakpalit@gmail.com], PhD - CRNN, CU. Selected Publication/s: Phys. Rev. B 104, 134437 (2021)

Dr. Bipul Kumar Mahato (RA1) - Magnon dynamics in ferro/antiferromagnets. [e-mail: bipul.kumar.mahato@gmail.com], PhD - SNBNCBS

Funding:

1. Institute Funding -  Seed grant, Annual grant, Individual grant
2. DST-SERB grant No. ECR/2017/002037
3. UGC-DAE CSR grant No. CRS-M-279
4. Support from the Technical Research Centre (TRC), IACS

Collaboration:

• Theory: Prof. Arghya Tarafdar (IIT, Kharagpur), Prof. Liping Yu (Univ. of Maine), Dr. Dibyendu Dey (Univ. of Maine), Dr. Kapildeb Dolui (Univ. of Delaware), Milena Grifoni (Universität Regensburg)
• Experiment: LNCMI (Grenoble), IUC (Indore), BARC

                      Prof, Achintya Singha (Bose Institute), Prof. Krishnakumar SR Menon (SINP), Dr. Atindra Nath Pal (SNBNCBS),                                        Prof. Sudip Malik (IACS),  Dr. Mintu Mondal (IACS)

Teaching:

Electronics (Theory) - BS-MS [with Electrodynamics course] - Spring Semester

Electronics (Theory and Practical) - Master's/Integrated Master's-Ph.D - Fall Semester

Out of Syllabus:

• Lockdown Special -  Playing with Sensors and Data Acquisition 
• Chua circuit: Introduction to Chaos - Demonstration [Theory: Prof. J. K. Bhattacharjee]
• Low-power Multimeter 
• Solving Differential Equation in Breadboard
• Can you assess "Soil Health"?     
• Modelling Spatiotemporal Variation of Precipitation                                           

For discussion:

You can reach me via email: sspsdd@iacs.res.in

You will find me at Lab 116E, IACS, Main Building

Homepage Figure: Laser Scanning Confocal Microscopy image of home grown FePS3 (vdW antiferromagnet) flakes on viscoelastic substrate.