Concordia University

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Vasilopoulos Research Group

Our current research can be broadly characterized as

TRANSPORT AND MANY-BODY EFFECTS IN NANOSTRUCTURES OF DIRAC MATERIALS.

We theoretically study (magneto)transport properties, e.g., spin-Hall effect, quantum Hall effect, optical absorption, etc., in novel graphene-like nanostructures, also known broadly as Dirac materials, and Floquet topological insulators. The combinations of different Dirac materials are known or referred to as van der Waals heterostructures. We also study thermal transport, and collective excitations, e.g., plasmons, surface plasmons, etc., in the same structures.

All studies focus on various ways to control transport in these materials and obtain results pertinent to the development of novel electronic, spintronic, and valleytronic devices.

Some explicit research topics of the group are:

1) Transport and many-body effects in transition-metal-dichalcogenides

2) Semimetal states and Coulomb screening in black phosphorus and Weyl materials

3) Atomic collapse in Dirac materials, influence on transport

Principal Investigator

This is an image of Marc Collette

Panagiotis Vasilopoulos, Ph.D
p.vasilopoulos@concordia.ca

Graduate Students

Muhammad

Muhammad Zubair, Ph. D. student
E-mail: muhammad.zubair@mail.concordia.ca
Bilayer Dirac Materials and Van Der Waals Heterostructures

Alumni

Dr. M. Tahir, E-mail: m.tahir06@alumni.imperial.ac.uk

Dr. V. Vargiamidis, E-mail: vasileios.vargiamidis@concordia.ca

Dr. P. Krstajic, E-mail: predrag222@gmail.com

Dr. Mousa Bahrami, E-mail: mousabahrami@gmail.com

recent publications

  1. Tahir, M. & Vasilopoulos, P. Commensurability Oscillations in a Periodically Modulated Phosphorene. Journal of Physics: Condensed Matter 29, 425302 (2017). pdf

  2. Mirzakhani, M., Zarenia, M., Vasilopoulos, P., Ketabi, S. A. & Peeters, F. M. Landau Levels in Biased Graphene Structures with Monolayer-Bilayer Interfaces. Physical Review B 96, (2017). pdf

  3. Bahrami, M. & Vasilopoulos, P. Exchange, Correlation, and Scattering Effects on Surface Plasmons in Arm-Chair Graphene Nanoribbons. Optics Express 25, 16840 (2017). pdf

  4. Zubair, M., Tahir, M., Vasilopoulos, P. & Sabeeh, K. Quantum Magnetotransport in Bilayer MoS2: Influence of Perpendicular Electric Field. Physical Review B 96, (2017). pdf

  5. Van Pottelberge, R., Zarenia, M., Vasilopoulos, P. & Peeters, F. M. Graphene Quantum Dot with a Coulomb Impurity: Subcritical and Supercritical Regime. Physical Review B 95, (2017). pdf

  6. Tahir, M., Krstajić, P. M. & Vasilopoulos, P. Magnetic and Electric Control of Spin- and Valley-Polarized Transport Across Tunnel Junctions on Monolayer WSe2. Physical Review B 95, (2017). pdf

  7. Li, L. L., Moldovan, D., Vasilopoulos, P. & Peeters, F. M. Aharonov-Bohm Oscillations in Phosphorene Quantum Rings. Physical Review B 95, (2017). pdf

  8. Mirzakhani, M., Zarenia, M., Vasilopoulos, P. & Peeters, F. M. Electrostatically Confined Trilayer Graphene Quantum Dots. Physical Review B 95, (2017). pdf

  9. Tahir, M., Krstajić, P. M. & Vasilopoulos, P. Zeeman- and Electric-Field Control of Spin- and Valley-Polarized Transport Through Biased Magnetic Junctions On WSe2. EPL 118, 17001 (2017). pdf

  10. Tahir, M., Vasilopoulos, P. & Schwingenschlögl, U. Unconventional Quantum Hall Effect in Floquet Topological Insulators. Journal of Physics: Condensed Matter 28, 385302 (2016). pdf

  11. Krstajić, P. M., Vasilopoulos, P. & Tahir, M. Spin- and Valley-Polarized Transport in a Monolayer Of MoS2. Physical Review B 94, (2016). pdf

  12. Tahir, M. & Vasilopoulos, P. Magneto-Optical Transport Properties of Monolayer WSe2. Physical Review B 94, (2016). pdf

  13. Missault, N., Vasilopoulos, P., Peeters, F. M. & Van Duppen, B. Spin- and Valley-Dependent Miniband Structure and Transport in Silicene Superlattices. Physical Review B 93, (2016). pdf

  14. Tahir, M., Vasilopoulos, P. & Peeters, F. M. Quantum Magnetotransport Properties of a MoS2 Monolayer. Physical Review B 93, (2016). pdf

  15. Krstajić, P. M., Vasilopoulos, P. & Tahir, M. Spin- and Valley-Polarized Transport Through Ferromagnetic and Antiferromagnetic Barriers on Monolayer MoS2. Physica E: Low-dimensional Systems and Nanostructures 75, 317–321 (2016). pdf

  16. Missault, N., Vasilopoulos, P., Vargiamidis, V., Peeters, F. M. & Van Duppen, B. Spin- and Valley-Dependent Transport Through Arrays of Ferromagnetic Silicene Junctions. Physical Review B 92, (2015). pdf

  17. Tahir, M., Vasilopoulos, P. & Peeters, F. M. Magneto-Optical Transport Properties of Monolayer Phosphorene. Physical Review B 92, 1 (2015). pdf

  18. Tahir, M. & Vasilopoulos, P. Off-Resonant Polarized Light-Controlled Thermoelectric Transport in Ultrathin Topological Insulators. Physical Review B 91, 1–5 (2015). pdf

  19. Vargiamidis, V. & Vasilopoulos, P. Polarized Spin and Valley Transport Across Ferromagnetic Silicene Junctions. Journal of Applied Physics 117, 094305 (2015). pdf

  20. Tahir, M. & Vasilopoulos, P. Electrically Tunable Magnetoplasmons in a Monolayer of Silicene or Germanene. Journal of Physics: Condensed Matter 27, 075303 (2015) pdf

  21. Shakouri, K., Vasilopoulos, P., Vargiamidis, V. & Peeters, F. M. Integer and Half-Integer Quantum Hall Effect in Silicene: Influence of an External Electric Field and Impurities. Physical Review B 90, 235423–1 (2014). pdf

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