2D Materials, Topological Insulators & Semimetals, Magnetic & Skyrmionic Materials, ARPES, First-Principles Calculations, DFT, Atomistic Spin Simulations


Sotirios Fragkos is a PhD student of the department of Mechanical Engineering, University of West Attica, since 2019, with dissertation title “On topological properties of materials: Topological insulators, Weyl and Dirac semimetals” in collaboration with the Epitaxy and Surface Science Laboratory (ESSL) within the framework of EU Horizon 2020 “SKYTOP” project, coordinated by National Centre for Scientific Research “Demokritos”.
He received his BSc degree on Mechanical Engineering in 2017, from the Technological Educational Institute of Piraeus, Greece. For his undergraduate thesis, he studied “On electronic band structure of 2D

materials, combining angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT)” in collaboration with ESSL.

Since 2017, he is a member of the ESSL, headed by Dr Athanasios Dimoulas, of the Institute of Nanoscience and Nanotechnology of NCSR "Demokritos".
His main interests focus on the theoretical study of magnetic-skyrmionic materials by DFT and atomistic-spin simulations, Topological Insulators, Weyl and Dirac semimetals and 2D Materials by first-principles calculations and their experimental characterization by ARPES. He has also participated in synchrotron ARPES beamlines (e.g., SOLEIL-Paris, ALS-Berkeley) and (co)authored publications in peer-reviewed scientific journals and participated in international scientific conferences.




Xenogiannopoulou, E., Tsoutsou, D., Tsipas, P., Fragkos, S., Chaitoglou, S., Kelaidis, N. and Dimoulas, A., Ultrathin epitaxial Bi film growth on 2D HfTe2template Nanotechnology, Volume 33, Article Number: 015701, 2022 [doi]

Tsipas, P., Pappas, P., Symeonidou, E., Fragkos, S., Zacharaki, C., Xenogiannopoulou, E., Siannas, N. and Dimoulas, A., Epitaxial HfTe2Dirac semimetal in the 2D limit APL Materials, Volume 9, Article Number: 101103, 2021 [doi]

Fragkos, S., Baringthon, L., Tsipas, P., Xenogiannopoulou, E., Le Fèvre, P., Kumar, P., Okuno, H., Reyren, N., Lemaitre, A., Patriarche, G., George, J.-M. and Dimoulas, A., Topological surface states in epitaxial (SnBi2Te4)n(Bi2Te3)m natural van der Waals superlattices Physical Review Materials, Volume 5, Article Number: 014203, 2021 [doi]

Zacharaki, C., Tsipas, P., Chaitoglou, S., Fragkos, S., Axiotis, M., Lagoyiannis, A., Negrea, R., Pintilie, L. and Dimoulas, A., Very large remanent polarization in ferroelectric Hf1-xZrxO2 grown on Ge substrates by plasma assisted atomic oxygen deposition Applied Physics Letters, Volume 114, Article Number: 112901, 2019 [doi]

Fragkos, S., Sant, R., Alvarez, C., Bosak, A., Tsipas, P., Tsoutsou, D., Okuno, H., Renaud, G. and Dimoulas, A., Room Temperature Commensurate Charge Density Wave in Epitaxial Strained TiTe 2 Multilayer Films Advanced Materials Interfaces, Volume 6, Article Number: 1801850, 2019 [doi]

Tsipas, P., Tsoutsou, D., Fragkos, S., Sant, R., Alvarez, C., Okuno, H., Renaud, G., Alcotte, R., Baron, T. and Dimoulas, A., Massless Dirac Fermions in ZrTe2 Semimetal Grown on InAs(111) by van der Waals Epitaxy ACS Nano, Volume 12, Pages: 1696-1703, 2018 [doi]

Tsipas, P., Fragkos, S., Tsoutsou, D., Alvarez, C., Sant, R., Renaud, G., Okuno, H. and Dimoulas, A., Direct Observation at Room Temperature of the Orthorhombic Weyl Semimetal Phase in Thin Epitaxial MoTe2 Advanced Functional Materials, Volume 28, Article Number: 1802084, 2018 [doi]

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