QMEL | Quantum Materials Epitaxy Laboratory, IIT Guwahati

Welcome to QMEL

The Department of Physics at IIT Guwahati is a pioneering force in physics research, offering students diverse prospects across a wide spectrum of disciplines. We aim to stay at the front of areas where ground-breaking physics discoveries may be possible.

The research at QMEL explores the quantum characteristics of condensed matter through a wide array of themes and methods. We push the boundaries of our understanding of quantum materials and assess their viability for quantum technologies.

Please check the opportunities in News and contact ✉ malli@iitg.ac.in.

Research

Research Areas

We prepare high-quality quantum materials to understand the fundamental physics behind emergent phenomena, such as phase-coherent quantum transport and quantum confinement, for energy-saving spintronics, optoelectronics and quantum computing.

Quantum Materials and Emerging Phenomena

Quantum transportQuantum confinementLow-dimensional physicsSpintronicsOptoelectronics

Preparation of Quantum Materials

Thin film growthMolecular beam epitaxyChemical vapor transport / depositionHybrid epitaxyE-beam evaporation

GeTe Epitaxy

BaTiO₃

DBR (distributed Bragg reflector)

InN

LED

Antiperovskites

MoS₂

Nanoenergy

NWs (nanowires)

QDs (quantum disks)

RHEED

Funding

Start-up Grant

IIT Guwahati, 2023

Facilities

Custom-built growth and in-situ analysis tools, with complementary characterization available within IIT G.

Growth and In-situ Analysis Systems

UHV Molecular Beam Epitaxy

Evaporates eleven materials at once onto a substrate heated up to 1300 °C.

Chemical Vapor Transport

Multi-zone CVD with multiple bubblers for high vapor pressure materials.
- In collaboration with Professor Kalyan

Dual Anode UHV XPS

In-situ spectroscopy of atomically thin layers, connected to the MBE by a UHV transfer arm.

2D Exfoliation Microscope

Trinocular microscope with linear and vertical stages.

Characterization Facilities

FESEMAFMPhotoluminescenceRamanEllipsometryXRD / XRRTEMEDXPPMS 9TSQUIDClean roomSputtering

Team

Principal Investigator

Dr. Malleswararao Tangi

Assistant Professor
Condensed Matter (Experiment)
Department of Physics
Indian Institute of Technology Guwahati
📧 malli@iitg.ac.in
📞 +91 361 258 3653

2023 - now Assistant Professor, IIT GuwahatiQuantum materials, semiconductors, thin films, optoelectronics
2022 - 2023 Research Scientist, Max Planck Institute of Microstructure Physics, GermanyAdvisor: Stuart S.P. Parkin. Epitaxy of spintronics materials
2020 - 2022 Alexander von Humboldt Experienced Researcher, GermanyHost: Stuart S.P. Parkin. Spintronics
2018 - 2019 Postdoctoral Associate, University of Minnesota, USAAdvisor: Bharat Jalan. Epitaxy of complex oxides
2015 - 2018 Postdoctoral fellow, KAUST, Saudi ArabiaAdvisor: Boon S. Ooi. III-nitride nanowire LEDs, 2D TMDs
2009 - 2015 Ph.D., JNCASR BangaloreAdvisor: S. M. Shivaprasad. MBE of Group-III nitrides
2007 - 2009 M.Sc. Physics, University of Hyderabad | 2003 - 2006 B.Sc., Andhra University

Ph.D. Scholars

AM

Avijit Mahapatra

MSc Physics, Vidyasagar University

DP

Dipankar Pokhrel

MSc Physics, University of Delhi

VR

Vikas Rav

MSc Physics, Babasaheb Bhimrao Ambedkar University

OM

Olivia Majumder

MSc Physics, University of Calcutta

M.Sc. Projects

B.Tech Projects BTP

B.Tech Mini Projects

Interns

Alumni

2024 – 2025Mahesh Jatav

Publications

Select a year to see its publications. Full list on Google Scholar.

Publications by Year

2018 8 publications

M. Tangi, J.-W. Min, D. Priante, R. C. Subedi, D. H. Anjum, A. Prabaswara, N. Alfaraj, J. W. Liang, M. K. Shakfa, T. K. Ng, and B. S. Ooi, “Observation of piezotronic and piezo-phototronic effects in n-InGaN nanowires/Ti grown by molecular beam epitaxy,” Nano Energy 54, 264 (2018).
J.-W. Min, D. Priante, M. Tangi, G. Liu, C. H. Kang, A. Prabaswara, C. Zhao, L. Al-Maghrabi, Y. Alaskar, A. M. Albadri, A. Y. Alyamani, T. K. Ng, and B. S. Ooi, “Unleashing the potential of molecular beam epitaxy grown AlGaN-based ultraviolet-spectrum nanowires devices,” J. Nanophotonics 12, 043511 (2018).
M. Tangi, P. Mishra, B. Janjua, A. Prabaswara, C. Zhao, D. Priante, J.-W. Min, T. K. Ng, and B. S. Ooi, “Role of quantum-confined stark effect on bias dependent photoluminescence of N-polar GaN/InGaN multi-quantum disk amber light emitting diodes,” J. Appl. Phys. 123, 105702 (2018).
M. S. Alias, A. Alatawi, K. C. Wong, M. Tangi, J. A. Holguin-Lerma, E. Stegenburgs, M. K. Shakfa, T. K. Ng, A. Rahman, A. Alyamani, and B. S. Ooi, “High reflectivity YDH/SiO₂ distributed Bragg reflector for UV-C wavelength regime,” IEEE Photonics J. 10, 2200508 (2018).
D. Priante, R. T. Elafandy, A. Prabaswara, B. Janjua, C. Zhao, M. Tangi, M. S. Alias, Y. Alaskar, A. M. Albadri, A. Y. Alyamani, T. K. Ng, and B. S. Ooi, “Evolution of Junction Temperature and Heating Effects in UV AlGaN Nanowires LEDs,” in 2018 Conference on Lasers and Electro-Optics/Pacific Rim (Optical Society of America, 2018), pp. 1–2.
M. S. Alias, M. Tangi, E. Stegenburgs, J. A. Holguin-Lerma, A. A. Alatawi, I. Ashry, R. C. Subedi, D. Priante, M. K. Shakfa, T. K. Ng, and B. S. Ooi, “Review of nanophotonics approaches using nanostructures and nanofabrication for III-nitrides ultraviolet-photonic devices,” J. Nanophotonics 12, 043508 (2018).
D. Priante, R. T. Elafandy, A. Prabaswara, B. Janjua, C. Zhao, M. S. Alias, M. Tangi, Y. Alaskar, A. M. Albadri, A. Y. Alyamani, T. K. Ng, and B. S. Ooi, “Diode junction temperature in ultraviolet AlGaN quantum-disks-in-nanowires,” J. Appl. Phys. 124, 015702 (2018).
M. Tangi, A. De, and S. M. Shivaprasad, “Role of dislocations and carrier concentration in limiting the electron mobility of InN films grown by plasma assisted molecular beam epitaxy,” J. Appl. Phys. 123, 015701 (2018).

Teaching

Courses taught at IIT Guwahati. Select a year to see its Odd (Jul – Nov) and Even (Jan – May) semesters, and summer or winter terms, if any, with theory and laboratory courses.

Courses Taught

Institute Administration Responsibilities

Institute roles

2026 – ongoingWarden

2023 – 2026Associate Warden

2026JOSA member

2026, 2025Convocation member

2025Faculty advisor, 2025 MSc batch

Conferences and workshops

2026Organizing member, Emerging Materials for Next Generation Photonics and Optoelectronics (EMPO 2026)

2024Faculty advisor, Research & Industrial Conclave conference

2024Organizing member, 7th Annual Conference on Quantum Condensed Matter (QMAT 2024)

2024Organizing member, Workshop on Neutron Scattering and Muon Spectroscopy

News

Openings: contact ✉ malli@iitg.ac.in for PhD and Postdoc positions. Also watch the Department, RnD and ANRF pages for PhD, IPDF and NPDF calls. BTech and MSc students are welcome to discuss their projects in my office.

Group News

2026 Welcome Olivia Majumder to the group (27 July).
2026 Avijit Mahapatra presents posters at EMPO 2026 (3 July) and ICMAGMA 2026 (3 June).
2026 Welcome Vikas to the group (March).
2025 Congratulations to Dipankar on his new job, Avijit on his first publication, and Aishwarya on campus placement.
2024 Started GeTe and TMD epitaxy research.
2023 Installed and commissioned the XPS, MBE and CVD facilities.

Media

Moments from the lab and the department.

Gallery

IIT G

Auditorium

Admin IITG

Reach Us

Welcome to QMEL

Research

Research Areas

Quantum Materials and Emerging Phenomena

Preparation of Quantum Materials

Funding

Start-up Grant

Facilities

Growth and In-situ Analysis Systems

UHV Molecular Beam Epitaxy

Chemical Vapor Transport

Dual Anode UHV XPS

2D Exfoliation Microscope

Characterization Facilities

Team

Principal Investigator

Dr. Malleswararao Tangi

Ph.D. Scholars

Avijit Mahapatra

Dipankar Pokhrel

Vikas Rav

Olivia Majumder

M.Sc. Projects

B.Tech Projects BTP

B.Tech Mini Projects

Interns

Alumni

Publications

Publications by Year

2026 2 publications

2025 4 publications

2024 1 publication

2023 1 publication

2021 1 publication

2019 4 publications

2018 8 publications

2017 5 publications

2016 3 publications

2015 1 publication

2014 3 publications

2013 3 publications

2012 3 publications

2011 1 publication

Teaching

Courses Taught

Odd semester Jul – Nov 2026

Theory

Laboratory

Even semester Jan – May 2026

Theory

Summer term May – Jul 2026

Theory

Odd semester Jul – Nov 2025

Theory

Laboratory

Even semester Jan – May 2025

Theory

Laboratory

Odd semester Jul – Nov 2024

Theory

Laboratory

Even semester Jan – May 2024

Theory

Laboratory

Summer term May – Jul 2024

Theory

Odd semester Jul – Nov 2023

Theory

Laboratory

Institute Administration Responsibilities

Institute roles

Conferences and workshops

News

Group News

Media

Gallery

IIT G

Auditorium

Admin IITG

Reach Us