Low-Dimensional Quantum Materials

Prof. Dr. Dmitri K. Efetov

Activities:

Since the first extraction of graphene and the subsequent Nobel Prize for its fascinating two-dimensional (2D) properties, a wide variety of atomically thin materials has been discovered, which together cover almost every phenomenon in condensed matter physics such as magnetism, superconductivity, topological insulation and many more. In contrast to its 3D counterparts, these materials become strongly renormalized in the strict 2D limit, through a combination of quantum confinement and enhanced electronic interactions. As a result these fascinating compounds exhibit enhanced quantum effects and display exceptionally strong interactions with electro-magnetic fields.

The low-dimensional quantum materials group uses innovative nano-fabrication techniques to create novel designer materials made by vertical stacking of various 2D materials such as graphene, hBN, MoS2, NbSe2 etc. The shear infinite number of combinations and stacking order allows to engineer exotic quantum systems with an unprecedented level of control and tune-ability. We study these complex electronic states with a combination of electrical, optical and thermal measurements, and employ these to provide new types of hybrid devices for quantum sensing applications.

The group has opportunities for outstanding Masters students, PhD students and postdocs. For more information, please contact This email address is being protected from spambots. You need JavaScript enabled to view it. directly. Information on application procedures can be found on the ICFO jobs website.

Collaborations:

Links:
• Group homepage

Contact: This email address is being protected from spambots. You need JavaScript enabled to view it.

Low-Dimensional Quantum Materials

Prof. Dr. Dmitri K. Efetov

Group Leader
• Prof. Dr. Dmitri K. Efetov

Postdoctoral Researchers
• Dr. José Durán
• Dr. Xiaobo Lu
• Dr. Aamir Mohammed Ali
• Dr. Nick Moore
• Dr. Petr Stepanov

Research Engineers
• Paul Seifert

PhD Students
• Ipsita Das
• Olaf Zimmermann

Low-Dimensional Quantum Materials

Prof. Dr. Dmitri K. Efetov

Regular Papers
• Thermal radiation control from hot graphene electrons coupled to a photonic crystal nanocavity R. Shiue, Y. Gao, C. Tan, C. Peng, J. Zheng, D. K. Efetov, Y. D. Kim, J. Hone, D. Englund Nature Commun. 10, 109 (2019)
• Compact mid-infrared graphene thermopile enabled by a nanopatterning technique of electrolyte gates C. Peng, S. Nanot, R. Shiue, G. Grosso, Y. Yang, M. Hempel, P. Jarillo-Herrero, J. Kong, F. Koppens, D. K. Efetov, D. R. Englund New J. Phys. 20, 083050 (2018)
• Fast thermal relaxation in cavity-coupled graphene bolometers with a Johnson noise read-out D. K. Efetov, R. Shiue, Y. Gao, B. Skinner, E. D. Walsh, H. Choi, J. Zheng, C. Tan, G. Grosso, C. Peng, J. Hone, K. C. Fong, D. Englund Nature Nanotechnol. 13, 797–801 (2018)
• Probing the ultimate plasmon confinement limits with a van der Waals heterostructure D. Alcaraz Iranzo, S. Nanot, E. J. C. Dias, I. Epstein, C. Peng, D. K. Efetov, M. B. Lundeberg, R. Parret, J. Osmond, J.-Y. Hong, J. Kong, D. R. Englund, N. M. R. Peres, F. H. L. Koppens Science 360, 291-295 (2018)
• Ultrafast graphene light emitters Y. D. Kim, Y. Gao, R. Shiue, L. Wang, O. B. Aslan, M. Bae, H. Kim, D. Seo, H. Choi, S. H. Kim, A. Nemilentsau, T. Low, C. Tan, D. K. Efetov, T. Taniguchi, K. Watanabe, K. L. Shepard, T. F. Heinz, D. Englund, J. Hone Nano Lett. 18, 934-940 (2018)
• A MoTe₂-based light-emitting diode and photodetector for silicon photonic integrated circuits Y. Bie, G. Grosso, M. Heuck, M. M. Furchi, Y. Cao, J. Zheng, D. Bunandar, E. Navarro-Moratalla, L. Zhou, D. K. Efetov, T. Taniguchi, K. Watanabe, J. Kong, D. Englund, P. Jarillo-Herrero Nature Nanotechnol. 12, 1124-1129 (2017) Highlighted in Nature Nanotechnol.
• Graphene-based Josephson-junction single-photon detector E. D. Walsh, D. K. Efetov, G.-H. Lee, M. Heuck, J. Crossno, T. A. Ohki, P. Kim, D. Englund, K. C. Fong Phys. Rev. Applied 8, 024022 (2017) Highlighted in Physics
• Inducing superconducting correlation in quantum Hall edge states G-H. Lee, K-F. Huang, D. K. Efetov, D. S. Wei, S. Hart, T. Taniguchi, K. Watanabe, A. Yacoby, P. Kim Nature Phys. 13, 693-698 (2017) Highlighted in Nature Phys.

Low-Dimensional Quantum Materials

Prof. Dr. Dmitri K. Efetov

• 2018-11-23 Kick-off meeting of the Quantum Flagship “2D·SIPC“ project ICFO hosts the kick-off meeting of the Quantum Flagship “2D·SIPC” project, aimed at developing quantum devices that can be easily integrated in existing current silicon-based technologies.
• 2018-11-06 Junior Leader “la Caixa” Fellowship Prof. Dmitri Efetov receives prestigious new fellowship from Obra Social ”la Caixa”
• 2018-06-11 Graphene Bolometers in Nature Nanotechnology An international study reports on the development of ultra-sensitive and ultra-fast graphene bolometers
• 2018-04-19 New record on squeezing light to one atom A study published in Science reports on how ICFO researchers, with MIT and Univ. of Minho, are able to confine and guide light down to a space of 1-atom thick in dimension.
• 2017-10-27 2D materials for all optical communication on silicon chips A study from MIT in collaboration with ICFO reports on a new MoTe2-based detector and emitter for silicon photonic integrated circuits.
• 2017-08-29 Graphene Single Photon Detectors A Harvard, ICFO, MIT, Raytheon BBN Tech and Pohang Univ. theoretical study shows how graphene can significantly increase the sensitivity of single-photon-detectors.
• 2017-07-25 New Group Leader Dr. Dmitri Efetov joins ICFO to start a new group that will focus on low-dimensional quantum materials
• 2017-04-05 Superconducting Correlation in a Quantum Hall system in Nature Physics Scientists realized crossed Andreev conversion in a graphene Quantum Hall system.