Introduction

In the nanophysics group we do experimental and theoretical research on various systems from nanometers to micron scale. Our experimental work includes fabrication, growth, and characterization of some types of nanostructures, like arrays of silicon nanowires, thin films, and nanoparticles. On the theoretical side we perform calculations and computer simulations of vacuum electronic devices, of perovskite based solar cells, of spin and charge transport and of excitons in semiconductor heterostructures, and in particular in core-shell nanowires. We also work with models of topological insulators.


Open PhD position

The Nanophysics Center of Reykjavik University has an open PhD position in the field of vacuum electronics. The project includes computer simulations of the dynamics of the electron beam released by a microscopic cathode, and in particular by a Carbon nanotube fiber, either due to photoemission or due to field emission. The effect of temperature, work function, cathode inhomogeneities, or ions present in the vacuum will be considered. The simulations will be compared with experimental results provided by a group of collaborators from outside Iceland or obtained at Reykjavik University, and the PhD student will have an opportunity to contribute to the experiments. Interested candidates will contact Prof. Ágúst Valfells, e-mail: avru.is, or Prof. Andrei Manolescu, e-mail manolesru.is, or Dr. Kristnn Torfason, e-mail kristinntru.is .


Recent publications from our group on related topics:

K. Torfason, A. Sitek, A. Manolescu, Á. Valfells, Dynamics of a Field Emitted Beam from a Microscopic Inhomogeneous Cathode, IEEE Transactions on Electron Devices, DOI 10.1109/TED.2021.3063210 arXiv:2011.13731 (2021).

A. Sitek, K. Torfason, A. Manolescu, and A. Valfells, Space-charge effects in the field-assisted thermionic emission from nonuniform cathodes, accepted for publication in Physical Review Applied, 15, 014040 (2021), arXiv:2009.13616.

J. B. Gunnarsson, K. Torfason, A. Manolescu, A. Valfells, Space-Charge Limited Current from a Finite Emitter in Nano- and Microdiodes, IEEE Transactions on Electron Devices 68, 342 (2021), arXiv:2010.01334.

H. V. Haraldsson, K. Torfason, A. Manolescu, and A. Valfells, Molecular Dynamics Simulations of Mutual Space-Charge Effect between Planar Field Emitters, IEEE Transactions on Plasma Science 48, 1967 (2020), DOI 10.1109/TPS.2020.2991582


The viking boat powered by perovskite solar cells

http://8see.infim.ro/index.php


Success story: High photoconductive oxide films functionalized with GeSi nanoparticles for environmental applications (PhotoNanoP)

A M-era.Net project with contributions from our group.
https://m-era.net/success-stories/high-photoconductive-oxide-films-functionalized-with-gesi-nanoparticles-for-environmental-applications-photonanop