Basic information

  • Current position: ICFO Research Fellow
  • Incoming position: Max Planck Research Group Leader, MPI-FKF (starting Spring 2026) − PhD and Postdoc positions available!
  • Contact Information
    • Mobile Phone: +33 631 308 826
    • Office: +34 935 534 164
    • Lab: +34 935 542 213; +34 935 542 212
    • E-mail: julien.barrier@icfo.eu
    • Mailing/Shipping address:
         Av. Carl Friedrich Gauss, num. 3
         08860 Castelldefels (Barcelona), Spain

Latest blog posts

Recent publications

  1. J. Barrier, L. Peng, S. Xu, V. I. Fal’ko, K. Watanabe, T. Tanigushi, A. K. Geim, S. Adam, and A. I. Berdyugin, Coulomb Screening of Superconductivity in Magic-Angle Twisted Bilayer Graphene, (2025). [arXiv:2412.01577] [DOI]
  2. A. Azimi, J. Barrier, A. Barreda, T. Bauer, F. Bouzari, A. Brokkelkamp, F. Buatier De Mongeot, T. Parsons, P. Christianen, S. Conesa-Boj, A. G. Curto, S. Das, B. Dias, I. Epstein, Z. Fedorova, F. J. García De Abajo, I. Goykhman, L. Greten, J. Grönqvist, L. Guarneri, Y. Guo, T. Hoekstra, X. Hu, B. Laudert, J. Lynch, S. Meyer, B. Munkhbat, D. Neshev, M. Ogienko, S. Papadopoulos, A. Parappurath, J. Sangers, P. Soubelet, C. Soukaras, G. Soavi, I. Staude, Z. Sun, K.-J. Tielrooij, M. G. Uddin, A. Ustinov, J. Van De Groep, J. Van Wezel, N. Vermeulen, H. Wang, Y. Wang, S. Xiao, B. You, and X. Zambrana-Puyalto, Photonics in Flatland: Challenges and Opportunities for Nanophotonics with 2D Semiconductors, Npj Nanophotonics 2, 44 (2025). [arXiv:2507.00336] [DOI]
  3. D. Domaretskiy, Z. Wu, V. H. Nguyen, N. Hayward, I. Babich, X. Li, E. Nguyen, J. Barrier, K. Indykiewicz, W. Wang, R. V. Gorbachev, N. Xin, K. Watanabe, T. Taniguchi, L. Hague, V. I. Fal’ko, I. V. Grigorieva, L. A. Ponomarenko, A. I. Berdyugin, and A. K. Geim, Proximity Screening Greatly Enhances Electronic Quality of Graphene, Nature 644, 646 (2025). [arXiv:2507.21997] [DOI]
  4. K. Nowakowski, H. Agarwal, S. Slizovskiy, R. Smeyers, X. Wang, Z. Zheng, J. Barrier, D. Barcons Ruiz, G. Li, R. Bertini, M. Ceccanti, I. Torre, B. Jorissen, A. Reserbat-Plantey, K. Watanabe, T. Taniguchi, L. Covaci, M. V. Milosevic, V. Fal’ko, P. Jarillo-Herrero, K. Kumar, and F. H. L. Koppens, Single-Photon Detection Enabled by Negative Differential Conductivity in Moiré Superlattices, Science 389, 644 (2025). [arXiv:2505.13637] [DOI]

Affiliation & Fundings

Disclaimer: Although I am affiliated with the Instite of Phonotic Sciences (ICFO), all views and opinions expressed on this blog are solely my own. They do not necessarily reflect those of any past or present employers, funding agencies, colleagues and organisations I have or had been affiliated with.