Welcome to the Demkov Materials Physics Group!

Our current research is focused on the physics of oxide heterostructres and their applications in photonic based quantum computing as well as neuromorphic computing. We work on the quantum theory of real materials, and molecular beam epitaxy (MBE). We do both theoretical and experimental research. Owing to the complexity of these problems, our research requires high performance computing, most of which is done at the Texas Advanced Computing Center (TACC), and the state of the art MBE Lab . Below and to the right is a list of our most recent papers (a full list is available under the publications tab).

We are always interested in recruiting new students who are interested in condensed matter physics, and hope you will consider our group for your studies.

Demkov Group News

Physica Statrus Solidi (b)
Our paper about Oxide-based Optoelectronics reveals the applications of oxides for photonic deveices and is selected as feature article on Physica Status Solidi (b).

Appl. Phys. Lett. Cover
Our recent paper on the piezoelectric modulation of the NLO response of BTO thin films was featured on the cover of the September issue of Applied Physics Letters!


J. Appl. Phys. Cover
Our recent paper on STO/LAO quantum wells was featured on the cover of the July issue of the Journal of Applied Physics!


Hosung Seo accepts first professor position at Ajou University
Demkov group alumni Hosung Seo has accepted his first position as an Assistant Professor at Ajou University. He is also currently a Visiting Scholar at the University of Chicago's Institute for Molecular Engineering. Congratulations Hosung!

Outstanding thesis award
Patrick's thesis was awarded the Best Thesis Award by the Physics Department for Summer 2017, the second one for the Demkov group this year. Congratulations Patrick!

Patrick Ponath graduates and joins LAM Research
Congratulations Patrick, and best of luck at LAM Research!

Outstanding thesis award
Kristy's thesis was awarded the Best Thesis Award by the Physics Department for Spring 2017. Congratulations Kristy!

Kristy Kormondy graduates and joins Intel
Congratulations Kristy, and best of luck at Intel!


Kurt joins Applied Materials Congratulations to Demkov group alumni Kurt Fredrickson on his new position at Applied Materials!

10 Most Recent Publications

• A. A. Demkov and A. B. Posadas, "Si-integrated ferroelectrics for photonics and optical computing," MRS Bulletin (2022).
• F. Al-Quaiti, P.-Y. Chen, J. G. Ekerdt and A. A. Demkov, "Contributions of bulk and surface energies in stabilizing metastable polymorphs: A comparative study of group 3 sesquioxides La₂O₃, Ga₂O₃, and In₂O₃," Phys. Rev. Materials 6, 043606 (2022).
• T. Hadamek, A. B. Posadas, F. Al-Quaiti, D. J. Smith, M. R. McCartney, E. Dombrowski and A. A. Demkov, "Epitaxial growth of β-Ga2O3 on SrTiO₃ (001) and SrTiO₃-buffered Si (001) substrates by plasma-assisted molecular beam epitaxy," J. Appl. Phys. 131, 145702 (2022).
• W. Li, J. Lee and A. A. Demkov, "Extrinsic magnetoelectric effect at the BaTiO₃/Ni interface," J. Appl. Phys. 131, 054101 (2022).
• A. B. Posadas, S. Kwon, A. Christensen, M. J. Kim and A. A. Demkov, "Facile growth of epitaxial vanadium monoxide on SrTiO₃ via substrate oxygen scavenging," J. Vac. Sci. Technol. A 40, 013416 (2022).
• T. T. Le, C. H. Lam, A. B. Posadas, A. A. Demkov and J. G. Ekerdt, "Epitaxial growth by atomic layer deposition and properties of high-k barium strontium titanate on Zintl-templated Ge (001) substrates," J. Vac. Sci. Technol. A 40, 0124011 (2022).
• W. Li, A. K. Hamze and A. A. Demkov, "Tunable giant nonlinear optical susceptibility in BaSnO₃ quantum wells," Phys. Rev. B 104, 235419 (2021).
• A. B. Posadas, H. Park, M. Reynaud, W. Cao, J. D. Reynolds, W. Guo, V. Jeyaselvan, I. Beskin, G. Mashanovich, J. H. Warner, and A. A. Demkov, "Thick BaTiO₃ epitaxial films integrated on Si by RF sputtering for electro-optic modulators in Si photonics," ACS Applied Materials & Interfaces 13, 51230 (2021).
• A. A. Demkov, C. Bajaj, J. G. Ekerdt, C. J. Palmström, and S. J. Ben Yoo, "Materials for emergent silicon-integrated optical computing," J. Appl. Phys. 130, 070907 (2021).
• I. M. Beskin, S. Kwon, A. B. Posadas, M. J. Kim, and A. A. Demkov, "Growth and structure of strong Pockels material strontium barium niobate (SBN) on SrTiOi₃ and Si by molecular beam epitaxy," Adv. Photonics Res. 2, 2100111 (2021).