László Pósa is research fellow at the Institute of Technical Physics and Materials Science, Centre for Energy Research, and a part time research fellow at Department of Physics, Budapest University of Technology and Economics. He received his PhD degree in 2019 at BME under the supervision of András Halbritter. His PhD work extended the research area of the Atomic and Molecular Electronics group at BME towards on-chip structures, where the base structure is fabricated by electron beam lithography, and then the active volume is confined towards the ultimate atomic dimensions by advanced electroformation techniques. Applying this idea, he has participated in the development of novel graphene nanogap devices in collaboration with the University of Basel/EMPA in Switzerland and studied resistive switching phenomena in ultrasmall nanofabricated graphene/SiO2/graphene and Ag/Ag2S/Ag devices. Since his graduation he coordinates the development of novel nanofabricated resistive switching devices in the research

Selected Publications:

A Rational Fabrication Method for Low Switching-Temperature VO2
L. Pósa, Gy. Molnár, B. Kalas, Zs. Baji, Zs. Czigány, P. Petrik, J. Volk
Nanomaterials 11, 212 (2021)

Multiple Physical Time Scales and Dead Time Rule in Few-Nanometers Sized Graphene–SiOx-Graphene Memristors ,
L. Pósa, M. El Abbassi, P. Makk, B. Sánta, C. Nef, M. Csontos, M. Calame, A. Halbritter,
Nano Letters 17, 6783 (2017)

High-yield fabrication of nm-size gaps in monolayer CVD graphene
C. Nef, L. Pósa, P. Makk, W. Fu, A. Halbritter, C. Schönenberger, M. Calame
Nanoscale 6, 7249 (2014)

From electroburning to sublimation: substrate and environmental effects in the electrical breakdown process of monolayer graphene
M. El Abbassi, L. Posa, P. Makk, C. Nef, K. Thodkar, A. Halbritter, M. Calame
Nanoscale 9, 17312 (2017)

Asymmetry-induced resistive switching in Ag-Ag2S-Ag memristors enabling a simplified atomic-scale memory design
A. Gubicza, D.Zs. Manrique, L. Pósa, C.J. Lambert, G. Mihály, M. Csontos, A. Halbritter,
Scientific Reports 6, 30775 (2016)