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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 materials such as graphene and topological insulators. He has pioneered the use of nonlocal devices to study the spin Hall effect, thermopiles to isolate the magnon drag in ferromagnetic materials, 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 prize, the IUPAP Young Scientist Prize and a ERC Consolidator Grant. He is also Principal Investigator of the Graphene Flagship, Grantor of the ICN2 “Severo Ochoa” Centre of Excellence Project and Coordinator of the FET-PROACTIVE Project "TOCHA". 

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 metrology. For more information see:

Selected publications

– J. F. Sierra JF, Fabian J, Kawakami RK, Roche S Valenzuela SO 2021, “Van der Waals heterostructures for spintronics and opto-spintronics” Nature Nanotechnology 16, 856-868.

– Lopes, J. Marcelo J.; Czubak, Dietmar; Zallo, Eugenio; Figueroa, Adriana, I; Guillemard, Charles; Valvidares, Manuel; Rubio-Zuazo, Juan; Lopez-Sanchez, Jesus; Valenzuela, Sergio O.; Hanke, Michael; Ramsteiner, Manfred 2021, ‘Large-area van der Waals epitaxy and magnetic characterization of Fe3GeTe2 films on graphene’, 2D Materials, 8, 4, 041001.

– Foa Torres LEF & S. O. Valenzuela SO 2021 A valley of opportunities: delving into graphene´s perplexing nonlocal response“, Physics World 34, 43

– Galceran R, Tian B, Li J, Bonell F, Jamet ;, Vergnaud C, Marty A, García JH, Sierra JF, Costache MV, Roche S, Valenzuela SO,  Manchon A, Zhang X, Schwingenschlög U 2021 “Control of spin–charge conversion in van der Waals heterostructures” APL Materials 9, 100901

– Giustino F, Lee JH, Trier F, Bibes M, Winter SM.; Valenti R, Son Y-W, Taillefer L, Heil C; Figueroa AI, Placais B, Wu QS; Yazyev OV, Bakkers EPAM, Nygard J, Forn-Diaz P, De Franceschi S, McIver JW, Foa Torres LEF, Low T, Kumar A, Galceran R, Valenzuela SO, Costache MV, Manchon A, Kim E-A, Schleder GR, Fazzio A & Roche S 2021, ‘The 2021 quantum materials roadmap‘, Journal Of Physics-Materials, 3, 4, 042006.

– Vila M, Hsu C-H, Garcia JH, Benítez LA, Waintal X, Valenzuela SO, Pereira VM, Roche S 2021, “Low-symmetry topological materials for large charge-to-spin interconversion: The case of transition metal dichalcogenide monolayers, Phys. Rev. Res. 3, 043230

Selected research activities

Coordinator FET-Proactive “TOCHA”

Grantor ICN2 Severo Ochoa Project

Task Leader “H2020 “Graphene Flagship”

STF “Industrial Board” Member

ICREA Memoir 2021