Basic information

  • Current position: ICFO Research Fellow
  • Affiliation: ICFO, Barcelona Institute of Science and Technology, Castelldefels, Spain
  • Office: 224, ICFO
  • Lab: L205, L110, L208, ICFO
  • 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. 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]
  2. P. Steiner, S. Adnan, M. Said Ergoktas, J. Barrier, X. Yu, V. Orts, G. Bakan, J. Aze, Y. Malevich, K. Wang, P. Cataldi, M. Bisset, S. Balci, S. Suzer, M. Khafizov, and C. Kocabas, Electrically Controlled Heat Transport in Graphite Films via Reversible Ionic Liquid Intercalation, Science Advances 8588 (2025). [arXiv:2202.10342] [DOI]
  3. R. Krishna Kumar, G. Li, R. Bertini, S. Chaudhary, K. Nowakowski, J. M. Park, S. Castilla, Z. Zhan, P. A. Pantaleón, H. Agarwal, S. Battle-Porro, E. Icking, M. Ceccanti, A. Reserbat-Plantey, G. Piccinini, J. Barrier, E. Khestanova, T. Taniguchi, K. Watanabe, C. Stampfer, G. Refael, F. Guinea, P. Jarillo-Herrero, J. C. W. Song, P. Stepanov, C. Lewandowski, and F. H. L. Koppens, Terahertz Photocurrent Probe of Quantum Geometry and Interactions In Magic-Angle Twisted Bilayer Graphene, Nature Materials 1034 (2025). [arXiv:2406.16532] [DOI]
  4. 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, (2024). [arXiv:2412.01577] [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.