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 is also Principal Investigator of the Graphene Flagship and 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 metrology. For more information see:

Selected publications

- Yang H, Valenzuela SO, Chshiev M, Couet S, Dieny B, Dlubak B, Fert A, Garello K, Jamet M, Jeong D-E, Lee K, Lee T, Martin M-B, Kar GS, Sénéor P, Shin H-J & Roche S 2022,  'Two-dimensional materials prospects for non-volatile spintronic memories', Nature 606, 663-673

- Camosi L, Svetl'ik J et al.. 2022, 'Resolving spin currents and spin densities generated by charge-spin interconversion in systems with reduced crystal symmetry', 2D Materials, 9, 3, 035014.

- Galceran R, Bonell F, Camosi L, Sauthier G, Gebeyehu ZM, Esplandiu MJ, Arrighi A, Fernandez Aguirre I, Figueroa AI, Sierra JF & Valenzuela SO 2022, 'Passivation of Bi2Te3 Topological Insulator by Transferred CVD-Graphene: Toward Intermixing-Free Interfaces', Advanced Materials Interfaces, 9, 2201997

- Tielrooij KJ, Principi A et al. 2022, 'Milliwatt terahertz harmonic generation from topological insulator metamaterials', Light-science & Applications, 11, 1, 315.

- Saleta Reig D, Varghese S, Farris R, Block A, Mehew JD, Hellman O, Woźniak P, Sledzinska M, El Sachat A, Chávez-Ángel E, Valenzuela SOvan Hulst NF, Ordejón P, Zanolli Z, Sotomayor Torres CM, Verstraete MJ, &Tielrooij K-J  2022, 'Unraveling Heat Transport and Dissipation in Suspended MoSe2 from Bulk to Monolayer', Adv. Mater. 2108352. 

- Arrighi A, del Corro E, Navarro Urrios D, Costache MV, Sierra JF, Watanabe K, Taniguchi T, Garrido JA, Valenzuela SO, Sotomayor Torres CM & Sledzinska M 2022, 'Heat dissipation in few-layer MoS2 and MoS2/hBN heterostructure', 2D Materials, 9, 1, 015005.

Selected research activities

Coordinator of FET-PROACTIVE Project "TOCHA and of M-ERA Project "2D-SPIN-MEM"