Available position: 2 PhD position (CSIR-UGC NET), One project position with valid Gate score (SERB) 
Principal Investigator:                                                                                         
Dr. Subhadeep Datta                                                                           
Assistant Professor (2019 -)
School of Physical Sciences
email id: sspsdd@iacs.res.in
Phone:+91-33-2473 4971 (ext 2141)
LAB: 116E, Main building, IACS
Office: Room No. C209, Centenary Building , IACS           
 
 

Our group El Nano

Research Interest: Experimental Condensed Matter Physics
Thrust Areas of Research:  Two-dimensional (2D) Magnetism, Mesoscopic Physics,
                                               Development of micro/nano-electronic sensors and arrays
 
What are the broad research questions/issues that interest us? 
        
  • 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?
  • Probing quasi 1D edge states of layered 2D semiconductor/insulator - 1D/2D vdW heterostructure  
  • Nanospintronics - Spin transport in quantum dots and 2D materials
  • Hybrid 2D materials (Graphene, 2D TMDCs, etc.)
 
Experimental Technique:
  • Sample growth - Chemical Vapor Transport, Solid State Reaction
  • Fabrication of devices: Lithography (e-beam, optical), Thermal evaporation, Sputtering
  • Characterization:
Bulk magnetization - SQUID/VSM,
Electronic/magnetotransport - Low temperature electron transport (Cryostat)
Phonons - Raman Spectroscopy (low-temperature), FT-IR
Local transport - Conductive Atomic Force Microscopy (CAFM)
 
Research Facility:
Group facility:
  • 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
 
Research Group:

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.  Selected Publication/s: ACS Nano (2021) [https://doi.org/10.1021/acsnano.1c08212]

Mr. Rahul Paramanik (JRF) - working on Microelectronic Devices. [e-mail: rahulparamanik456@gmail.com].  BSc - Burdwan University, MSc - ISM Dhanbad. 

Ms. Tanima Kundu (JRF, INSPIRE) -  working on magnetic semiconductors and related devices.  [e-mail: tanima.kundu96@gmail.com], BSc - Burdwan University, MSc - Burdwan University. 

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

Dr. Subrata Ghosh (RA1) - Magnetocaloric Effect -  [e-mail: subrataghosh728@gmail.com], PhD - SNBNCBS

Funding:

  1. Recent grant (2022 - ): CRG/2021/004334, Total cost: 49,12,920 INR (SERB) + 24,75,000 INR (Inst equipment 50% share), Title: Two-dimensional Magnets under Extreme Conditions: Manipulation of Electronic and Magnetic Order

  2. Institute Funding -  Seed grant, Annual grant, Individual grant

  3. DST-SERB grant No. ECR/2017/002037
  4. UGC-DAE CSR grant No. CRS-M-279
  5. 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)                                        

 

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.  

Subhadeep Datta

Assistant Professor

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