Controlling Memory Effects in 2D Material Systems via Electrostatic and Optical Modulation
Date: 2026/04/27 – 2026/04/27
Academic Seminar: Controlling Memory Effects in 2D Material Systems via Electrostatic and Optical Modulation
Speaker: Alisson Ronieri Cadore, Full Scientist at the Brazilian National Laboratory of Nanotechnology
Time: 10:00 a.m., April 27, 2026 (Beijing Time)
Location: Room 503, Longbin Building
Abstract
The study of two-dimensional (2D) materials has enabled novel architectures for both volatile and nonvolatile memory devices. Graphene, transition metal dichalcogenides, and natural micas can be assembled into van der Waals heterostructures with atomically tunable properties. This versatility supports the development of high-density memories with low power consumption and ultrafast response. Memory behavior in these systems can be engineered and dynamically controlled by external parameters such as gate-voltage amplitude, sweep rate, and optical excitation with lasers [1-4]. In this talk, I will discuss fabrication strategies, advanced electrical and optical characterization methods, and the underlying physical mechanisms governing memory effects. I will also address current challenges and future perspectives for integrating these materials into emerging quantum technologies. Finally, I will present recent results on naturally occurring minerals and their potential for optoelectronic applications.
Biography
Alisson Ronieri Cadore is a Full Scientist at the Brazilian National Laboratory of Nanotechnology (LNNano), where he leads research in 2D materials and van der Waals heterostructures for next-generation optoelectronic and memory devices. With a PhD in Physics from the Federal University of Minas Gerais (supervised by Prof. Leonardo Campos), he expanded his expertise through a postdoctoral fellowship at the Cambridge Graphene Centre (University of Cambridge, supervised by Prof. Andrea Ferrari) and prior research at UC Santa Barbara (with Prof. Andrea Young). His pioneering work includes the conceptualization of “Mem-emitters”—hybrid devices merging light emission with memristive memory—and the development of ultracompact, cryogenically stable non-volatile memory architectures using graphene/hBN heterostructures, both featured as cover art in Nano Letters (2025) and ACS Applied Electronic Materials (2025). He has also advanced 2D semiconductor applications through studies on WS₂ luminescence enhancement (2024) and the use of natural biotite crystals as dielectrics (2024), contributing significantly to the EU Graphene Flagship initiative. His research bridges fundamental physics with scalable nanoelectronic solutions.