Sergio O. Valenzuela

Sergio O. Valenzuela

Institut Català de Nanociència i Nanotecnologia

Engineering Sciences

Sergio O. Valenzuela is an ICREA Prof. at the Catalan Institute of Nanoscience and Nanotechnology (ICN2). He leads the Physics and Engineering of Nanodevices group, which focuses on quantum transport, spintronics and thermoelectricity in quantum and topological materials. He has pioneered nonlocal devices to study the spin Hall effect, thermopiles to isolate the magnon drag in ferromagnets and implemented novel qubit control and spectroscopy methods. Prof. Valenzuela received a PhD in Physics at the University of Buenos Aires and held research positions at Harvard University and MIT. He is recipient of the Giambiagi and IUPAP Young Scientist Prizes, a ERC Consolidator Grant and is a 2022 elected member of the Academia Europaea and 2022 APS Fellow. He has also been Principal Investigator of the Graphene Flagship and is Grantor of the ICN2 “Severo Ochoa” Centre of Excellence Project. 

Research interests

In recent years, electronic devices have been scaled down to nanoscale sizes where quantum effects begin to interfere with their functioning. Materials and devices in such scales often present unexpected and counterintuitive physical properties. Prof. Valenzuela's Group focus is the development of novel devices, which are designed to gain insight of specific physical properties of the system components, relevant both for fundamental reasons and applications at the nanoscale. The current research interests of the group span spintronics, spin caloritronics, quantum transport and manipulation, using 2D materials and topological insulators, and quantum transduction and metrology. For more information see: http://nanodevices.icn2.cat.

Selected publications

- Guillet T, Galceran R, Sierra JF, Belarre FJ, Ballesteros B, Costache MV, Dosenovic D, Okuno H, Marty A, Jamet M, Bonell F & Valenzuela SO 2024, 'Spin-Orbit Torques and Magnetization Switching in (Bi,Sb)2Te3/Fe3GeTe2 Heterostructures Grown by Molecular Beam Epitaxy', Nano letters, 24 - 3 - 822 - 828.
- Denisov KS, Rozhansky IV, Valenzuela SO & Zutic I 2024, 'Terahertz spin-light coupling in proximitized Dirac materials', Physical review b, 109 - 20 -L201406.
- Valenzuela SO, Gambardella P, Garello K , Klein O, Sierra JF & Sinova J 2024, 'Spintronic Materials', Encyclopedia of Condensed Matter Physics, 2nd Edition, vol 2 - 159-176.
- Roche S, van Wees B, Garello K & Valenzuela SO 2024, 'Spintronics with two-dimensional materials and van der Waals heterostructures', 2d materials, 11 - 4 -043001.
- Xu K, Martínez Armesto L, Svetlík J, Sierra JF, Marinova V, Dimitrov D, Goñi AR, Krysztofik A, Graczykowski B, Rurali R, Valenzuela SO, & Reparaz JS, 'Unravelling the Origin of Thermal Anisotropy in PdSe2', 2D Mater., 11, 045006/1-8.

Selected research activities

Selected Invited Talks and Lectures
 
– Workshop on Applied Spintronic Phenomena, June 3-5, Kaiserslautern, Germany.
 
– International Conference on Superconductivity and Magnetism ICSM 2024, April 27-May 4, Fethiye, Türkiye.
 
– MRS-Materials Research Society Fall Meeting, November 30-December 6, Boston, USA.
 
Other Activities
 
– Organizer “Topological Matter Conference” May 6-10, San Sebastián, Spain.
 
– Co-chair of the International Scientific Committee, QUANTUMatter 2024 and Topic Chair International Conference on Magnetism ICM2024.
 
– Coordinator of FET-PROACTIVE Project “Dissipationless topological channels for information transfer and quantum metrology”.
 
– Editorial Board in npj Spintronics (Nature Publishing Group) and in Advanced Physics Research (Wiley).